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Protislovje - Wikipedija, prosta enciklopedija

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class="vector-menu-heading"> Skupnost </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Pomo%C4%8D:Vsebina" title="Kraj, kjer lahko prejmete pomoč"><span>Pomoč</span></a></li><li id="n-Pod-lipo" class="mw-list-item"><a href="/wiki/Wikipedija:Pod_lipo"><span>Pod lipo</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedija:Portal_skupnosti" title="O projektu, kaj lahko storite, kje lahko kaj najdete"><span>Portal skupnosti</span></a></li><li id="n-contact" class="mw-list-item"><a href="/wiki/Wikipedija:Stik_z_nami"><span>Stik z nami</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Glavna_stran" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedija" 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</ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Videz"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page&#039;s font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Videz" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Videz</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&amp;utm_medium=sidebar&amp;utm_campaign=C13_sl.wikipedia.org&amp;uselang=sl" class=""><span>Denarni prispevki</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Posebno:Registracija&amp;returnto=Protislovje" title="Predlagamo vam, da si ustvarite račun in se prijavite, vendar to ni obvezno." class=""><span>Ustvari račun</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Posebno:Prijava&amp;returnto=Protislovje" title="Prijava je zaželena, vendar ni obvezna [o]" accesskey="o" class=""><span>Prijava</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Več možnosti" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Osebna orodja" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Osebna orodja</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Uporabniški meni" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&amp;utm_medium=sidebar&amp;utm_campaign=C13_sl.wikipedia.org&amp;uselang=sl"><span>Denarni prispevki</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Posebno:Registracija&amp;returnto=Protislovje" title="Predlagamo vam, da si ustvarite račun in se prijavite, vendar to ni obvezno."><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Ustvari račun</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Posebno:Prijava&amp;returnto=Protislovje" title="Prijava je zaželena, vendar ni obvezna [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Prijava</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Strani za neprijavljene urejevalce <a href="/wiki/Pomo%C4%8D:Uvod" aria-label="Več o urejanju"><span>več o tem</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Posebno:MojiPrispevki" title="Seznam urejanj s tega IP-naslova [y]" accesskey="y"><span>Prispevki</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Posebno:MojPogovor" title="Pogovor o urejanjih s tega IP-naslova [n]" accesskey="n"><span>Pogovorna stran</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"><!-- CentralNotice --></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Projekt"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Vsebina" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Vsebina</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">prestavi v stransko letvico</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">skrij</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Uvod</div> </a> </li> <li id="toc-Zgodovina" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Zgodovina"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Zgodovina</span> </div> </a> <ul id="toc-Zgodovina-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-V_formalni_logiki" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#V_formalni_logiki"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>V formalni logiki</span> </div> </a> <button aria-controls="toc-V_formalni_logiki-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Vklopi podrazdelek V formalni logiki</span> </button> <ul id="toc-V_formalni_logiki-sublist" class="vector-toc-list"> <li id="toc-Dokaz_s_protislovjem" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Dokaz_s_protislovjem"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Dokaz s protislovjem</span> </div> </a> <ul id="toc-Dokaz_s_protislovjem-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Simbolična_reprezentacija" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Simbolična_reprezentacija"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Simbolična reprezentacija</span> </div> </a> <ul id="toc-Simbolična_reprezentacija-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Pojem_protislovja_v_aksiomatičnem_sistemu_in_dokaz_njegove_neprotislovnosti" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Pojem_protislovja_v_aksiomatičnem_sistemu_in_dokaz_njegove_neprotislovnosti"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Pojem protislovja v aksiomatičnem sistemu in dokaz njegove neprotislovnosti</span> </div> </a> <ul id="toc-Pojem_protislovja_v_aksiomatičnem_sistemu_in_dokaz_njegove_neprotislovnosti-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Filozofija" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Filozofija"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Filozofija</span> </div> </a> <button aria-controls="toc-Filozofija-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Vklopi podrazdelek Filozofija</span> </button> <ul id="toc-Filozofija-sublist" class="vector-toc-list"> <li id="toc-Pragmatična_protislovja" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Pragmatična_protislovja"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Pragmatična protislovja</span> </div> </a> <ul id="toc-Pragmatična_protislovja-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Dialektični_materializem" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Dialektični_materializem"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Dialektični materializem</span> </div> </a> <ul id="toc-Dialektični_materializem-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Zunaj_formalne_logike" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Zunaj_formalne_logike"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Zunaj formalne logike</span> </div> </a> <ul id="toc-Zunaj_formalne_logike-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Glej_tudi" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Glej_tudi"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Glej tudi</span> </div> </a> <ul id="toc-Glej_tudi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sklici" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Sklici"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Sklici</span> </div> </a> <ul id="toc-Sklici-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Viri" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Viri"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Viri</span> </div> </a> <ul id="toc-Viri-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Vsebina" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vklopi kazalo vsebine" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vklopi kazalo vsebine</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Protislovje</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="P9jdi na članek v drugem jeziku. Na voljo v 38 jezikih." > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-38" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">38 jezikov</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D9%86%D8%A7%D9%82%D8%B6_(%D9%85%D9%86%D8%B7%D9%82)" title="تناقض (منطق) – arabščina" lang="ar" hreflang="ar" data-title="تناقض (منطق)" data-language-autonym="العربية" data-language-local-name="arabščina" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B8%D0%B2%D0%BE%D1%80%D0%B5%D1%87%D0%B8%D0%B5_(%D0%BB%D0%BE%D0%B3%D0%B8%D0%BA%D0%B0)" title="Противоречие (логика) – bolgarščina" lang="bg" hreflang="bg" data-title="Противоречие (логика)" data-language-autonym="Български" data-language-local-name="bolgarščina" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%86%D8%A7%D8%AA%DB%95%D8%A8%D8%A7%DB%8C%DB%8C" title="ناتەبایی – osrednja kurdščina" lang="ckb" hreflang="ckb" data-title="ناتەبایی" data-language-autonym="کوردی" data-language-local-name="osrednja kurdščina" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Kontradikce" title="Kontradikce – češčina" lang="cs" hreflang="cs" data-title="Kontradikce" data-language-autonym="Čeština" data-language-local-name="češčina" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Kontradiktion" title="Kontradiktion – danščina" lang="da" hreflang="da" data-title="Kontradiktion" data-language-autonym="Dansk" data-language-local-name="danščina" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Kontradiktion" title="Kontradiktion – nemščina" lang="de" hreflang="de" data-title="Kontradiktion" data-language-autonym="Deutsch" data-language-local-name="nemščina" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Contradiction" title="Contradiction – angleščina" lang="en" hreflang="en" data-title="Contradiction" data-language-autonym="English" data-language-local-name="angleščina" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Kontra%C5%ADdiro_(filozofio)" title="Kontraŭdiro (filozofio) – esperanto" lang="eo" hreflang="eo" data-title="Kontraŭdiro (filozofio)" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Contradicci%C3%B3n" title="Contradicción – španščina" lang="es" hreflang="es" data-title="Contradicción" data-language-autonym="Español" data-language-local-name="španščina" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D9%86%D8%A7%D9%82%D8%B6" title="تناقض – perzijščina" lang="fa" hreflang="fa" data-title="تناقض" data-language-autonym="فارسی" data-language-local-name="perzijščina" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Contradiction" title="Contradiction – francoščina" lang="fr" hreflang="fr" data-title="Contradiction" data-language-autonym="Français" data-language-local-name="francoščina" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Contradici%C3%B3n" title="Contradición – galicijščina" lang="gl" hreflang="gl" data-title="Contradición" data-language-autonym="Galego" data-language-local-name="galicijščina" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A1%D7%AA%D7%99%D7%A8%D7%94_(%D7%9C%D7%95%D7%92%D7%99%D7%A7%D7%94)" title="סתירה (לוגיקה) – hebrejščina" lang="he" hreflang="he" data-title="סתירה (לוגיקה)" data-language-autonym="עברית" data-language-local-name="hebrejščina" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B5%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%98%E0%A4%BE%E0%A4%A4_(%E0%A4%85%E0%A4%A8%E0%A5%8D%E0%A4%A4%E0%A4%B0%E0%A5%8D%E0%A4%B5%E0%A4%BF%E0%A4%B0%E0%A5%8B%E0%A4%A7)" title="व्याघात (अन्तर्विरोध) – hindijščina" lang="hi" hreflang="hi" data-title="व्याघात (अन्तर्विरोध)" data-language-autonym="हिन्दी" data-language-local-name="hindijščina" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kontradiksi" title="Kontradiksi – indonezijščina" lang="id" hreflang="id" data-title="Kontradiksi" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonezijščina" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/M%C3%B3ts%C3%B6gn" title="Mótsögn – islandščina" lang="is" hreflang="is" data-title="Mótsögn" data-language-autonym="Íslenska" data-language-local-name="islandščina" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Contraddizione" title="Contraddizione – italijanščina" lang="it" hreflang="it" data-title="Contraddizione" data-language-autonym="Italiano" data-language-local-name="italijanščina" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%9F%9B%E7%9B%BE" title="矛盾 – japonščina" lang="ja" hreflang="ja" data-title="矛盾" data-language-autonym="日本語" data-language-local-name="japonščina" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D2%9A%D0%B0%D1%80%D0%B0%D0%BC%D0%B0-%D2%9B%D0%B0%D0%B9%D1%88%D1%8B%D0%BB%D1%8B%D2%9B" title="Қарама-қайшылық – kazaščina" lang="kk" hreflang="kk" data-title="Қарама-қайшылық" data-language-autonym="Қазақша" data-language-local-name="kazaščina" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%AA%A8%EC%88%9C" title="모순 – korejščina" lang="ko" hreflang="ko" data-title="모순" data-language-autonym="한국어" data-language-local-name="korejščina" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B8%D0%B2%D1%80%D0%B5%D1%87%D0%BD%D0%BE%D1%81%D1%82" title="Противречност – makedonščina" lang="mk" hreflang="mk" data-title="Противречност" data-language-autonym="Македонски" data-language-local-name="makedonščina" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Kontradiksi" title="Kontradiksi – malajščina" lang="ms" hreflang="ms" data-title="Kontradiksi" data-language-autonym="Bahasa Melayu" data-language-local-name="malajščina" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Contradictie" title="Contradictie – nizozemščina" lang="nl" hreflang="nl" data-title="Contradictie" data-language-autonym="Nederlands" data-language-local-name="nizozemščina" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Selvmotsigelse" title="Selvmotsigelse – knjižna norveščina" lang="nb" hreflang="nb" data-title="Selvmotsigelse" data-language-autonym="Norsk bokmål" data-language-local-name="knjižna norveščina" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Sprzeczno%C5%9B%C4%87_(kwadrat_logiczny)" title="Sprzeczność (kwadrat logiczny) – poljščina" lang="pl" hreflang="pl" data-title="Sprzeczność (kwadrat logiczny)" data-language-autonym="Polski" data-language-local-name="poljščina" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Contradi%C3%A7%C3%A3o" title="Contradição – portugalščina" lang="pt" hreflang="pt" data-title="Contradição" data-language-autonym="Português" data-language-local-name="portugalščina" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B8%D0%B2%D0%BE%D1%80%D0%B5%D1%87%D0%B8%D0%B5" title="Противоречие – ruščina" lang="ru" hreflang="ru" data-title="Противоречие" data-language-autonym="Русский" data-language-local-name="ruščina" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Contradiction" title="Contradiction – Simple English" lang="en-simple" hreflang="en-simple" data-title="Contradiction" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Kontradikcia" title="Kontradikcia – slovaščina" lang="sk" hreflang="sk" data-title="Kontradikcia" data-language-autonym="Slovenčina" data-language-local-name="slovaščina" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B8%D0%B2%D1%80%D0%B5%D1%87%D0%BD%D0%BE%D1%81%D1%82" title="Противречност – srbščina" lang="sr" hreflang="sr" data-title="Противречност" data-language-autonym="Српски / srpski" data-language-local-name="srbščina" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Mots%C3%A4gelse" title="Motsägelse – švedščina" lang="sv" hreflang="sv" data-title="Motsägelse" data-language-autonym="Svenska" data-language-local-name="švedščina" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Kontradiksiyon" title="Kontradiksiyon – tagalogščina" lang="tl" hreflang="tl" data-title="Kontradiksiyon" data-language-autonym="Tagalog" data-language-local-name="tagalogščina" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/%C3%87eli%C5%9Fki" title="Çelişki – turščina" lang="tr" hreflang="tr" data-title="Çelişki" data-language-autonym="Türkçe" data-language-local-name="turščina" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D1%83%D0%BF%D0%B5%D1%80%D0%B5%D1%87%D0%BD%D1%96%D1%81%D1%82%D1%8C" title="Суперечність – ukrajinščina" lang="uk" hreflang="uk" data-title="Суперечність" data-language-autonym="Українська" data-language-local-name="ukrajinščina" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%AA%D8%B6%D8%A7%D8%B1%D8%A8_(%D9%85%D9%86%D8%B7%D9%82)" title="تضارب (منطق) – urdujščina" lang="ur" hreflang="ur" data-title="تضارب (منطق)" data-language-autonym="اردو" data-language-local-name="urdujščina" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/M%C3%A2u_thu%E1%BA%ABn" title="Mâu thuẫn – vietnamščina" lang="vi" hreflang="vi" data-title="Mâu thuẫn" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamščina" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%9F%9B%E7%9B%BE" title="矛盾 – kitajščina" lang="zh" hreflang="zh" data-title="矛盾" data-language-autonym="中文" data-language-local-name="kitajščina" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%9F%9B%E7%9B%BE" title="矛盾 – kantonščina" lang="yue" hreflang="yue" data-title="矛盾" data-language-autonym="粵語" data-language-local-name="kantonščina" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q363948#sitelinks-wikipedia" title="Uredi medjezikovne povezave" class="wbc-editpage">Uredi povezave</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Imenski prostori"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Protislovje" title="Ogled vsebinske strani [c]" accesskey="c"><span>Stran</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Pogovor:Protislovje&amp;action=edit&amp;redlink=1" rel="discussion" class="new" title="Pogovor o vsebinski strani (stran ne obstaja) [t]" accesskey="t"><span>Pogovor</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Spremeni različico jezika" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">slovenščina</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Pogledi"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Protislovje"><span>Preberi</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Protislovje&amp;veaction=edit" title="Uredite to stran [v]" accesskey="v"><span>Uredi stran</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Protislovje&amp;action=edit" title="Uredi izvorno kodo te strani [e]" accesskey="e"><span>Uredi kodo</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Protislovje&amp;action=history" title="Prejšnje redakcije te strani [h]" accesskey="h"><span>Zgodovina</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Orodja strani"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Orodja" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Orodja</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Orodja</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">prestavi v stransko letvico</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">skrij</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Več možnosti" > <div class="vector-menu-heading"> Dejanja </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Protislovje"><span>Preberi</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Protislovje&amp;veaction=edit" title="Uredite to stran [v]" accesskey="v"><span>Uredi stran</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Protislovje&amp;action=edit" title="Uredi izvorno kodo te strani [e]" accesskey="e"><span>Uredi kodo</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Protislovje&amp;action=history"><span>Zgodovina</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Splošno </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Posebno:KajSePovezujeSem/Protislovje" title="Seznam vseh strani, ki se povezujejo sem [j]" accesskey="j"><span>Kaj se povezuje sem</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Posebno:RecentChangesLinked/Protislovje" rel="nofollow" title="Zadnje spremembe na straneh, s katerimi se povezuje ta stran [k]" accesskey="k"><span>Povezane spremembe</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Posebno:PosebneStrani" title="Seznam vseh posebnih strani [q]" accesskey="q"><span>Posebne strani</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Protislovje&amp;oldid=5992228" title="Trajna povezava na to redakcijo strani"><span>Trajna povezava</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Protislovje&amp;action=info" title="Več informacij o tej strani"><span>Podatki o strani</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Posebno:Navedi&amp;page=Protislovje&amp;id=5992228&amp;wpFormIdentifier=titleform" title="Informacije o tem, kako navajati to stran"><span>Navedba članka</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Posebno:UrlShortener&amp;url=https%3A%2F%2Fsl.wikipedia.org%2Fwiki%2FProtislovje"><span>Pridobi skrajšani URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Posebno:QrCode&amp;url=https%3A%2F%2Fsl.wikipedia.org%2Fwiki%2FProtislovje"><span>Prenesi kodo QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Tiskanje/izvoz </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Posebno:Book&amp;bookcmd=book_creator&amp;referer=Protislovje"><span>Ustvari e-knjigo</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Posebno:DownloadAsPdf&amp;page=Protislovje&amp;action=show-download-screen"><span>Prenesi kot PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Protislovje&amp;printable=yes" title="Različica te strani za tisk [p]" accesskey="p"><span>Različica za tisk</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> V drugih projektih </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Logical_contradiction" hreflang="en"><span>Wikimedijina zbirka</span></a></li><li class="wb-otherproject-link wb-otherproject-wikiquote mw-list-item"><a href="https://sl.wikiquote.org/wiki/Protislovje" hreflang="sl"><span>Wikinavedek</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q363948" title="Povezava na ustrezni predmet v podatkovni shrambi [g]" accesskey="g"><span>Predmet v Wikipodatkih</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Orodja strani"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Videz"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Videz</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">prestavi v stransko letvico</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skrij</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Iz Wikipedije, proste enciklopedije</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="sl" dir="ltr"><figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Slika:Square_of_opposition,_set_diagrams.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Square_of_opposition%2C_set_diagrams.svg/250px-Square_of_opposition%2C_set_diagrams.svg.png" decoding="async" width="250" height="324" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Square_of_opposition%2C_set_diagrams.svg/375px-Square_of_opposition%2C_set_diagrams.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/51/Square_of_opposition%2C_set_diagrams.svg/500px-Square_of_opposition%2C_set_diagrams.svg.png 2x" data-file-width="479" data-file-height="620" /></a><figcaption>Diagram kaže protislovne relacijske zveze med <a href="/w/index.php?title=Kategori%C4%8Dna_trditev&amp;action=edit&amp;redlink=1" class="new" title="Kategorična trditev (stran ne obstaja)">kategoričnimi trditvami</a> v <a href="/w/index.php?title=Logi%C4%8Dni_kvadrat&amp;action=edit&amp;redlink=1" class="new" title="Logični kvadrat (stran ne obstaja)">logičnem kvadratu</a> <a href="/w/index.php?title=Tradicionalna_logika&amp;action=edit&amp;redlink=1" class="new" title="Tradicionalna logika (stran ne obstaja)">Aristotelove logike</a>.</figcaption></figure> <p><b>Protislóvje</b><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup> (s tujko <b>kontradíkcija</b><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup class="reference" style="white-space:nowrap;">:607</sup> in tudi <b>antinomíja</b>,<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><sup class="reference" style="white-space:nowrap;">:55</sup> starinsko <i>protiréčje</i><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup>) je v <a href="/w/index.php?title=Klasi%C4%8Dna_logika&amp;action=edit&amp;redlink=1" class="new" title="Klasična logika (stran ne obstaja)">klasični logiki</a> pojav ali stanje sestavljeno iz <a href="/wiki/Logika" title="Logika">logične</a> nezdružljivosti med dvema ali več <a href="/w/index.php?title=Trditev&amp;action=edit&amp;redlink=1" class="new" title="Trditev (stran ne obstaja)">trditvami</a> (<a href="/w/index.php?title=Propozicija&amp;action=edit&amp;redlink=1" class="new" title="Propozicija (stran ne obstaja)">propozicijami</a>). Pojavi se kadar dve trditvi vzeti skupaj vodita do dveh zaključkov (<a href="/wiki/Implikacija" title="Implikacija">implikacij</a>), ki tvorita logični, po navadi nasprotni inverziji drugega z drugim. <a href="/wiki/Aristotel" title="Aristotel">Aristotelov</a> <a href="/w/index.php?title=Zakon_o_neprotislovju&amp;action=edit&amp;redlink=1" class="new" title="Zakon o neprotislovju (stran ne obstaja)">zakon o neprotislovju</a> ilustrira splošno težnjo v uporabni logiki in pravi, da je »nemogoče reči o nečem, da je in da ni v enakem oziru in v enakem času.« </p><p>Razširjeno gledano zunaj klasične logike se lahko govori o protislovjih med <a href="/w/index.php?title=Akcija&amp;action=edit&amp;redlink=1" class="new" title="Akcija (stran ne obstaja)">akcijami</a>, kadar se predpostavi, da si njihovi vzroki med seboj nasprotujejo. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Zgodovina">Zgodovina</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=1" title="Uredi razdelek: Zgodovina" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=1" title="Urejanje izvorne kode razdelka: Zgodovina"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>S tvorjenjem <a href="/wiki/Paradoks" title="Paradoks">paradoksa</a> je <a href="/wiki/Platon" title="Platon">Platonov</a> dialog <i><a href="/w/index.php?title=Evtidem&amp;action=edit&amp;redlink=1" class="new" title="Evtidem (stran ne obstaja)">Evtidem</a></i> prikazal potrebo po pojmu <i>protislovja</i>. V svojem dialogu je <a href="/w/index.php?title=Dionisodor_(sofist)&amp;action=edit&amp;redlink=1" class="new" title="Dionisodor (sofist) (stran ne obstaja)">Dionisodor</a> zanikal obstoj »protislovja,«&#160;<a href="/wiki/Sokrat" title="Sokrat">Sokrat</a> pa mu je nasprotoval: </p> <dl><dd>»Na svoje začudenje sem dejal: Kaj misliš Dionisodor? Velikokrat sem slišal in sem bil začuden, da sem slišal to tvojo tezo, ki jo vzdržujejo in rabijo <a href="/wiki/Protagora" title="Protagora">Protagorovi</a> učenci in mnogi pred njim. Zdi se mi dokaj presenetljiva in samomorilska kakor tudi uničujoča. Mislim, da sem verjetno o njeni resničnosti slišal od tebe. Izreka je, da ne obstaja nekaj kakor laž – človek mora reči kaj je resnično, drugače naj molči. Ali ni takšno tvoje mnenje?«</dd></dl> <p>Dionisodor se je res strinjal, da »ne obstaja nekaj kot je napačno mnenje ... ne obstaja nekaj kar je nevednost«&#160;in je od Sokrata zahteval naj ga ovrže. Sokrat se je odzval: »Kako naj te ovržem, če, kakor praviš, je treba reči, da je laž nemogoča?«<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="V_formalni_logiki">V formalni logiki</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=2" title="Uredi razdelek: V formalni logiki" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=2" title="Urejanje izvorne kode razdelka: V formalni logiki"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd>Opomba: Simbol <a href="/w/index.php?title=%E2%8A%A5&amp;action=edit&amp;redlink=1" class="new" title="⊥ (stran ne obstaja)">⊥</a> (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \bot }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">&#x22A5;<!-- ⊥ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \bot }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f282c7bc331cc3bfcf1c57f1452cc23c022f58de" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.808ex; height:2.176ex;" alt="{\displaystyle \bot }"></span>, <i>falsum</i>) predstavlja poljubno protislovje z dualom simbolom <a href="/w/index.php?title=%E2%8A%A4&amp;action=edit&amp;redlink=1" class="new" title="⊤ (stran ne obstaja)">⊤</a> (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \top }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">&#x22A4;<!-- ⊤ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \top }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/cf12e436fef2365e76fcb1034a51179d8328bb33" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.808ex; height:2.176ex;" alt="{\displaystyle \top }"></span>, <i>verum</i>), ki predstavlja poljubno <a href="/w/index.php?title=Tavtologija&amp;action=edit&amp;redlink=1" class="new" title="Tavtologija (stran ne obstaja)">tavtologijo</a>. Protislovje se včasih označi kot »O<i>pq</i>«, tavtologija pa kot »V<i>pq</i>«. Desno zasukani simbol <a href="/w/index.php?title=%E2%8A%A2&amp;action=edit&amp;redlink=1" class="new" title="⊢ (stran ne obstaja)">⊢</a> (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \vdash }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mo>&#x22A2;<!-- ⊢ --></mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \vdash }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a0c0d30cf8cb7dba179e317fcde9583d842e80f6" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.42ex; height:2.176ex;" alt="{\displaystyle \vdash }"></span>) po navadi pomeni »sledi«&#160;ali »je dokazano«.</dd></dl> <p>V klasični logiki in še posebej v <a href="/wiki/Propozicijska_logika" title="Propozicijska logika">propozicijski logiki</a> in <a href="/w/index.php?title=Logika_prvega_reda&amp;action=edit&amp;redlink=1" class="new" title="Logika prvega reda (stran ne obstaja)">logiki prvega reda</a> je trditev <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \varphi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C6;<!-- φ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \varphi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/33ee699558d09cf9d653f6351f9fda0b2f4aaa3e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.52ex; height:2.176ex;" alt="{\displaystyle \varphi }"></span> protislovje, <a href="/wiki/%C4%8Ce_in_samo_%C4%8De" class="mw-redirect" title="Če in samo če">če in samo če</a> je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \varphi \vdash \bot }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C6;<!-- φ --></mi> <mo>&#x22A2;<!-- ⊢ --></mo> <mi mathvariant="normal">&#x22A5;<!-- ⊥ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \varphi \vdash \bot }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/cb2a11d466849d8b206a4a6c934264fe16835bb8" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:6.039ex; height:2.676ex;" alt="{\displaystyle \varphi \vdash \bot }"></span>. Ker za protislovnost <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \varphi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C6;<!-- φ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \varphi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/33ee699558d09cf9d653f6351f9fda0b2f4aaa3e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.52ex; height:2.176ex;" alt="{\displaystyle \varphi }"></span> velja, da je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \vdash \varphi \rightarrow \psi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mo>&#x22A2;<!-- ⊢ --></mo> <mi>&#x03C6;<!-- φ --></mi> <mo stretchy="false">&#x2192;<!-- → --></mo> <mi>&#x03C8;<!-- ψ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \vdash \varphi \rightarrow \psi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/60875b3cd620fe51bd3d52cde99877beece9a333" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:8.713ex; height:2.676ex;" alt="{\displaystyle \vdash \varphi \rightarrow \psi }"></span> za vse <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \psi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C8;<!-- ψ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \psi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/45e5789e5d9c8f7c79744f43ecaaf8ba42a8553a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.513ex; height:2.509ex;" alt="{\displaystyle \psi }"></span> (ker je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \bot \rightarrow \psi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">&#x22A5;<!-- ⊥ --></mi> <mo stretchy="false">&#x2192;<!-- → --></mo> <mi>&#x03C8;<!-- ψ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \bot \rightarrow \psi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/45163f41b18eb09992b3a349ecc08f7c3727451b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:6.935ex; height:2.509ex;" alt="{\displaystyle \bot \rightarrow \psi }"></span>), se lahko dokaže katerakoli trditev iz množice <a href="/wiki/Aksiom" title="Aksiom">aksiomov</a>, ki vsebuje protislovja. To se imenuje&#160;»<a href="/w/index.php?title=Na%C4%8Delo_eksplozije&amp;action=edit&amp;redlink=1" class="new" title="Načelo eksplozije (stran ne obstaja)">načelo eksplozije</a>«&#160;ali »ex falso quodlibet«&#160;(»iz laži sledi vse«). </p><p>V <a href="/w/index.php?title=Polnost_(logika)&amp;action=edit&amp;redlink=1" class="new" title="Polnost (logika) (stran ne obstaja)">polni</a> logiki je <a href="/wiki/Formula" title="Formula">formula</a> protislovna, če in samo če je <a href="/w/index.php?title=Zadovoljivost&amp;action=edit&amp;redlink=1" class="new" title="Zadovoljivost (stran ne obstaja)">nezadovoljiva</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Dokaz_s_protislovjem">Dokaz s protislovjem</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=3" title="Uredi razdelek: Dokaz s protislovjem" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=3" title="Urejanje izvorne kode razdelka: Dokaz s protislovjem"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dd><div class="noprint relarticle mainarticle"><i>Glavni članek&#58; <a href="/wiki/Dokaz_s_protislovjem" title="Dokaz s protislovjem">dokaz s protislovjem</a>.</i></div></dd></dl> <p>Za trditev <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \varphi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C6;<!-- φ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \varphi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/33ee699558d09cf9d653f6351f9fda0b2f4aaa3e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.52ex; height:2.176ex;" alt="{\displaystyle \varphi }"></span> velja, da je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \vdash \varphi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mo>&#x22A2;<!-- ⊢ --></mo> <mi>&#x03C6;<!-- φ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \vdash \varphi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1a2839796eeedb8fa1b52ea144c0f42adc133021" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:3.586ex; height:2.676ex;" alt="{\displaystyle \vdash \varphi }"></span>, kar pomeni, da je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \varphi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C6;<!-- φ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \varphi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/33ee699558d09cf9d653f6351f9fda0b2f4aaa3e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.52ex; height:2.176ex;" alt="{\displaystyle \varphi }"></span> tavtologija, oziroma, da je vedno resnična, če in samo če je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \neg \varphi \vdash \bot }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">&#x00AC;<!-- ¬ --></mi> <mi>&#x03C6;<!-- φ --></mi> <mo>&#x22A2;<!-- ⊢ --></mo> <mi mathvariant="normal">&#x22A5;<!-- ⊥ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \neg \varphi \vdash \bot }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/bcda508f1420c8819d5274380988ac290d2846c8" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:7.589ex; height:2.676ex;" alt="{\displaystyle \neg \varphi \vdash \bot }"></span>, ali, če je <a href="/wiki/Negacija" title="Negacija">negacija</a> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \varphi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C6;<!-- φ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \varphi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/33ee699558d09cf9d653f6351f9fda0b2f4aaa3e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.52ex; height:2.176ex;" alt="{\displaystyle \varphi }"></span> protislovje. Zato <a href="/w/index.php?title=Formalni_dokaz&amp;action=edit&amp;redlink=1" class="new" title="Formalni dokaz (stran ne obstaja)">dokaz</a>, da je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \neg \varphi \vdash \bot }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">&#x00AC;<!-- ¬ --></mi> <mi>&#x03C6;<!-- φ --></mi> <mo>&#x22A2;<!-- ⊢ --></mo> <mi mathvariant="normal">&#x22A5;<!-- ⊥ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \neg \varphi \vdash \bot }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/bcda508f1420c8819d5274380988ac290d2846c8" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:7.589ex; height:2.676ex;" alt="{\displaystyle \neg \varphi \vdash \bot }"></span> tudi dokaže, da je <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \varphi }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C6;<!-- φ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \varphi }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/33ee699558d09cf9d653f6351f9fda0b2f4aaa3e" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.52ex; height:2.176ex;" alt="{\displaystyle \varphi }"></span> resnična. Raba tega dejstva sestavlja tehniko dokaza s protislovjem, ki ga matematiki veliko rabijo. To velja le v logiki, ki kot aksiom rabi izključeni srednji <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A\vee \neg A}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>A</mi> <mo>&#x2228;<!-- ∨ --></mo> <mi mathvariant="normal">&#x00AC;<!-- ¬ --></mi> <mi>A</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle A\vee \neg A}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/323f5c2a8924ef707dcc24cee3bce1b148ec1367" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:7.619ex; height:2.176ex;" alt="{\displaystyle A\vee \neg A}"></span>. </p> <div class="mw-heading mw-heading3"><h3 id="Simbolična_reprezentacija"><span id="Simboli.C4.8Dna_reprezentacija"></span>Simbolična reprezentacija</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=4" title="Uredi razdelek: Simbolična reprezentacija" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=4" title="Urejanje izvorne kode razdelka: Simbolična reprezentacija"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>V matematiki se simbol, ki predstavlja protislovje znotraj dokaza, razlikuje.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> Nekateri simboli, ki se lahko rabijo za reprezentacijo protislovja, so: ↯, Opq, <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \Rightarrow \Leftarrow }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mo stretchy="false">&#x21D2;<!-- ⇒ -->&#x21D0;<!-- ⇐ --></mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \Rightarrow \Leftarrow }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/0910f38ab10fa4e15bb398d89588f6a2147e6d0c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:4.648ex; height:1.843ex;" alt="{\displaystyle \Rightarrow \Leftarrow }"></span>, ⊥, ↮ in ※. V vsakem <a href="/wiki/Simbolizem" title="Simbolizem">simbolizmu</a> se lahko protislovje zamenja za resničnostno vrednost&#160;»<a href="/w/index.php?title=Napa%C4%8Dno_(logika)&amp;action=edit&amp;redlink=1" class="new" title="Napačno (logika) (stran ne obstaja)">napačno</a>,«&#160;ki ga simbolizira na primer znak&#160;»<a href="/wiki/0" title="0">0</a>.«&#160;Velikokrat se vidi okrajšava <a href="/wiki/Q.E.D." title="Q.E.D.">Q.E.D.</a> ali kakšna različica takoj za simbolom protislovja – to se pojavi v dokazu s protislovjem, kjer se naznači, da je bila izvirna predpostavka napačna in, da mora biti njena negacija pravilna. </p> <div class="mw-heading mw-heading3"><h3 id="Pojem_protislovja_v_aksiomatičnem_sistemu_in_dokaz_njegove_neprotislovnosti"><span id="Pojem_protislovja_v_aksiomati.C4.8Dnem_sistemu_in_dokaz_njegove_neprotislovnosti"></span>Pojem protislovja v aksiomatičnem sistemu in dokaz njegove neprotislovnosti</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=5" title="Uredi razdelek: Pojem protislovja v aksiomatičnem sistemu in dokaz njegove neprotislovnosti" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=5" title="Urejanje izvorne kode razdelka: Pojem protislovja v aksiomatičnem sistemu in dokaz njegove neprotislovnosti"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/w/index.php?title=Neprotislovnost&amp;action=edit&amp;redlink=1" class="new" title="Neprotislovnost (stran ne obstaja)">Dokaz o neprotislovnosti</a> zahteva (i) <a href="/w/index.php?title=Aksiomati%C4%8Dni_sistem&amp;action=edit&amp;redlink=1" class="new" title="Aksiomatični sistem (stran ne obstaja)">aksiomatični sistem</a> in (ii) prikaz, da se lahko formula <i>p</i> ter njena negacija <i>~p</i> izpeljeta v njem. Vendar po katerikoli metodi se izpeljuje, bodo dokazi o neprotislovnosti <i>izgledali</i> kot da zahtevajo primitivni pojem <i>protislovja</i> – še več, <i>izgleda</i>, da bo ta pojem moral biti istočasno »zunaj«&#160;formalnega sistema v definiciji tavtologije. </p><p>Ko je <a href="/w/index.php?title=Emil_Leon_Post&amp;action=edit&amp;redlink=1" class="new" title="Emil Leon Post (stran ne obstaja)">Emil Leon Post</a> v svojem delu iz leta 1921 <i>Introduction to a general theory of elementary propositions</i> razširil svoj dokaz neprotislovnosti propozicijske logike (to je logike) za tisto v delu <i><a href="/w/index.php?title=Principia_Mathematica&amp;action=edit&amp;redlink=1" class="new" title="Principia Mathematica (stran ne obstaja)">Principia Mathematica</a></i> (PM), je opazil, da v oziru na <i>posplošeno</i> množico <a href="/wiki/Postulat" class="mw-redirect" title="Postulat">postulatov</a> (aksiomov) ni mogel več samodejno priklicati pojma »protislovja«&#160;– takšnega pojma postulati ne bi vsebovali: </p> <dl><dd>»Glavna zahteva za množico postulatov je, da je neprotislovna. Ker običajni pojem neprotislovnosti vključuje tisto o protislovju, ki spet vključuje negacijo, in ker se ta funkcija ne pojavlja v splošnem kot primitivna v [<i>posplošeni</i> množici postulatov], je potrebna nova definicija.«<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup></dd></dl> <p>Postova rešitev problema je opisana v prikazu <i>An Example of a Successful Absolute Proof of Consistency</i>, ki sta ga podala <a href="/w/index.php?title=Ernest_Nagel&amp;action=edit&amp;redlink=1" class="new" title="Ernest Nagel (stran ne obstaja)">Ernest Nagel</a> in <a href="/w/index.php?title=James_Roy_Newman&amp;action=edit&amp;redlink=1" class="new" title="James Roy Newman (stran ne obstaja)">James Roy Newman</a> in svojem delu <i><a href="/wiki/Kurt_G%C3%B6del" title="Kurt Gödel">Gödel's</a> Proof</i> iz leta 1958. Tudi onadva sta opazovala problem glede na pojem »protislovja«&#160;s svojima običajnima »pravilnostnima vrednostima«&#160;»pravilnosti«&#160;in »napačnosti.«&#160;Opazila sta, da je: </p> <dl><dd>»značilnost tavtologije definirana s pojmoma pravilnosti in napačnosti. Ta dva pojma očitno vključujeta sklic na nekaj <i>zunaj</i> formulskega računa. Zato postopek, omenjen v besedilu, v resnici ponuja <i>interpretacijo</i> računa z zagotovitvijo modela za sistem. Zaradi tega avtorji niso storili tega kar so obljubili, namreč <b>definirati značilnost formul z izrazi čisto strukturnih gradnikov samih formul.</b>«&#160;[Res] ... dokazi o neprotislovnosti, ki temeljijo na modelih, in, ki dokazujejo iz pravilnosti aksiomov na njihovo neprotislovnost, le spremenijo problem.«<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup></dd></dl> <p>Z danimi nekaterimi »primitivnimi formulami«, kot sta primitiva iz PM S<sub>1</sub> V S<sub>2</sub> [inkluzivni ALI], ~S (negacija), je treba definirati aksiome v izrazih teh primitivnih pojmov. Vseskozi Post prikazuje v PM in definira (kakor tudi Nagel in Newman, glej spodaj), da je značilnost <i>tavtologičnosti</i>, ki jo je treba še definirati, »podedovana«: če se začne z množico tavtoloških aksiomov (postulatov) in <a href="/w/index.php?title=Dedukcijski_sistem&amp;action=edit&amp;redlink=1" class="new" title="Dedukcijski sistem (stran ne obstaja)">dedukcijskim sistemom</a>, ki vsebuje <a href="/w/index.php?title=Substitucija_(logika)&amp;action=edit&amp;redlink=1" class="new" title="Substitucija (logika) (stran ne obstaja)">substitucijo</a> in <a href="/w/index.php?title=Modus_ponens&amp;action=edit&amp;redlink=1" class="new" title="Modus ponens (stran ne obstaja)">modus ponens</a>, bo <i>neprotislovni</i> sistem dal le tavtološke formule. </p><p>Kaj bo torej definicija <i>tavtologičnosti</i>? </p><p>Nagel in Newman sta tvorila dva <a href="/wiki/Nezdru%C5%BEljivi_dogodki" title="Nezdružljivi dogodki">medsebojno izključujoča</a> in izčrpljujoča se razreda K<sub>1</sub> in K<sub>2</sub> v katera pade (rezultat) aksiomov, kadar so njune spremenljivke, npr. S<sub>1</sub> in S<sub>2</sub>, prirejene iz teh razredov. To velja tudi za primitivne formule. Na primer: »Formula z obliko S<sub>1</sub> V S<sub>2</sub> je dana v razred K<sub>2</sub>, če sta obe S<sub>1</sub> and S<sub>2</sub> v K<sub>2</sub>, drugače ja dana v K<sub>1</sub>«&#160;in »Formula z obliko ~S je dana v K<sub>2</sub>, če je S v K<sub>1</sub>, drugače je dana v K<sub>1</sub>.«<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> </p><p>Nagel in Newman sta lahko sedaj definirala pojem <i>tavtologičnosti</i>: »formula je tavtologija, če in samo če pade v razred K<sub>1</sub> neglede v katerem od obeh razredov so postavljeni njeni elementi.«<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Sedaj je značilnost »biti tavtologičen«&#160;opisana brez sklica na model ali interpretacijo. </p> <dl><dd>Če je na primer dana formula, kot je ~S<sub>1</sub> V S<sub>2</sub> in prireditev K<sub>1</sub> v S<sub>1</sub> in K<sub>2</sub> v S<sub>2</sub>, se lahko ovrednoti in vstavi njen rezultat v enega od obeh razredov. Prireditev K<sub>1</sub> v S<sub>1</sub> postavi ~S<sub>1</sub> v K<sub>2</sub> – sedaj se lahko vidi, da ta prireditev povzroči, da formula pade v razred K<sub>2</sub>. Tako po definiciji ta formula ni tavtologija.</dd></dl> <p>Post je opazil, da če je sistem protisloven, lahko dedukcija v njem (to je zadnja formula v zaporedju formul izpeljana iz tavtologij) končno prinese sámo S. Ker lahko prireditev spremenljivke S izhaja iz razreda K<sub>1</sub> ali K<sub>2</sub>, dedukcija krši dedovalno značilnost tavtologije – izpeljava mora prinesti (ovrednotenje formule), ki bo padla v razred K<sub>1</sub>. Odtod je lahko Post izpeljal naslednjo definicijo protislovnosti <i>brez rabe pojma protislovja</i>: </p> <dl><dd>Deficija. <i>Sistem bo protisloven, če prinese trditev nespremenjene spremenljivke p [S je v Newmanovih in Nagelovih zgledih].</i></dd></dl> <p>Z drugimi besedami se lahko pojem »protislovja«razdeli kadar se konstruira dokaz neprotislovnosti – kar ga zamenja, je pojem »medsebojno izključujočih in izčrpljujočih se«&#160;razredov. Ni treba, da aksiomatični sistem, kar je še bolj zanimivo, nujno vsebuje pojem »protislovja.« </p> <div class="mw-heading mw-heading2"><h2 id="Filozofija">Filozofija</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=6" title="Uredi razdelek: Filozofija" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=6" title="Urejanje izvorne kode razdelka: Filozofija"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Pristaši <a href="/wiki/Epistemologija" title="Epistemologija">epistemološke</a> teorije <a href="/w/index.php?title=Koherentizem&amp;action=edit&amp;redlink=1" class="new" title="Koherentizem (stran ne obstaja)">koherentizma</a> običajno trdijo, da je potreben pogoj za zagovor <a href="/w/index.php?title=Prepri%C4%8Danje&amp;action=edit&amp;redlink=1" class="new" title="Prepričanje (stran ne obstaja)">prepričanja</a> v tem, da mora biti prepričanje del logičnega neprotislovnega <a href="/wiki/Sistem" title="Sistem">sistema</a> prepričanj. Nekateri <a href="/w/index.php?title=Diateleizem&amp;action=edit&amp;redlink=1" class="new" title="Diateleizem (stran ne obstaja)">diateleisti</a>, kot tudi <a href="/w/index.php?title=Grahan_Priest&amp;action=edit&amp;redlink=1" class="new" title="Grahan Priest (stran ne obstaja)">Grahan Priest</a>, so razpravljali, da protislovje nujno ne zahteva neprotislovnosti.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Pragmatična_protislovja"><span id="Pragmati.C4.8Dna_protislovja"></span>Pragmatična protislovja</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=7" title="Uredi razdelek: Pragmatična protislovja" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=7" title="Urejanje izvorne kode razdelka: Pragmatična protislovja"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Pragmatično protislovje se pojavi kadar vsak stavek argumenta nasprotuje trditvam, ki jih trdi. Neprotislovnost nastane v tem primeru, ker dejanje izraza namesto vsebine izrečenega izpodbija njegov zaključek.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> Na primer verjetno <a href="/wiki/Friedrich_Wilhelm_Nietzsche" class="mw-redirect" title="Friedrich Wilhelm Nietzsche">Nietzschejeva</a> izjava, da nekdo ne sme ubogati drugih, ali <a href="/w/index.php?title=Mooreov_paradoks&amp;action=edit&amp;redlink=1" class="new" title="Mooreov paradoks (stran ne obstaja)">Mooreov paradoks</a>. Znotraj analitične tradicije jih vidijo kot <a href="/w/index.php?title=Samoizpodbijajo%C4%8Da_ideja&amp;action=edit&amp;redlink=1" class="new" title="Samoizpodbijajoča ideja (stran ne obstaja)">samoizpodbijajoče izjave</a> in <a href="/w/index.php?title=Izvr%C5%A1no_protislovje&amp;action=edit&amp;redlink=1" class="new" title="Izvršno protislovje (stran ne obstaja)">izvršna protislovja</a>. Druge tradicije jih obravnavajo bolj kot <a href="/wiki/Zen_budizem" title="Zen budizem">zenovske</a> <a href="/wiki/Koan" title="Koan">koane</a> v katerih avtorjevi nameni tvorijo protislovje s pomočjo tradicionalnega pomena, nato pa se sugerira nov pomen besede, ki ne nasprotuje izjavi. </p> <div class="mw-heading mw-heading3"><h3 id="Dialektični_materializem"><span id="Dialekti.C4.8Dni_materializem"></span>Dialektični materializem</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=8" title="Uredi razdelek: Dialektični materializem" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=8" title="Urejanje izvorne kode razdelka: Dialektični materializem"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>V <a href="/wiki/Dialekti%C4%8Dni_materializem" title="Dialektični materializem">dialektičnem materializmu</a> se protislovja, kot so ipeljana iz <a href="/w/index.php?title=Hegeljanstvo&amp;action=edit&amp;redlink=1" class="new" title="Hegeljanstvo (stran ne obstaja)">hegeljanstva</a>, po navadi nanašajo na nasprotstvo, ki neločljivo obstaja znotraj enega področja, ene poenotene sile ali objekta. To protislovje v nasprotju z metafizičnim mišljenjem ni objektivno nemogoča stvar, ker te protislovje sile obstajajo v objektivni stvarnosti in se med seboj ne izničujejo, ampak dejansko definirajo obstoj druga druge. Po <a href="/wiki/Marksizem" title="Marksizem">marsistični</a> teoriji se lahko takšna protislovja najde na primer v dejstvu, da: </p> <dl><dd>(a) velikansko bogastvo in produktivne moči soobstajajo skupaj</dd> <dd>(b) obstaja skrajna revščina in beda</dd> <dd>(c) obstaja (a), ki je v nasprotju z obstojem (b).</dd></dl> <p>Hegeljanska in marksistična teorija določata, da bo <a href="/wiki/Dialektika" title="Dialektika">dialektična</a> narava zgodovine vodila do <a href="/w/index.php?title=Aufhebung&amp;action=edit&amp;redlink=1" class="new" title="Aufhebung (stran ne obstaja)">razveljavitve</a> ali <a href="/w/index.php?title=Teza,_antiteza,_sinteza&amp;action=edit&amp;redlink=1" class="new" title="Teza, antiteza, sinteza (stran ne obstaja)">sinteze</a> svojih protislovij. <a href="/wiki/Karl_Marx" title="Karl Marx">Marx</a> je zato predpostavil, da bo zgodovina logično naredila, da se bo <a href="/wiki/Kapitalizem" title="Kapitalizem">kapitalizem</a> razvil v <a href="/wiki/Socializem" title="Socializem">socialistično</a> družbo, kjer bodo <a href="/w/index.php?title=Proizvodna_sredstva&amp;action=edit&amp;redlink=1" class="new" title="Proizvodna sredstva (stran ne obstaja)">proizvodna sredstva</a> enako služila <a href="/wiki/Proletariat" title="Proletariat">izkoriščanemu in trpečemu</a> družbenemu razredu in tako bo razrešeno predhodno protislovje med (a) in (b).<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> </p><p><a href="/wiki/Mao_Cetung" title="Mao Cetung">Mao Cetungov</a> filozofski esej <i>O protislovju</i> (《矛盾论》) iz leta 1937 je podprl Marxove in <a href="/wiki/Vladimir_Ilji%C4%8D_Uljanov" class="mw-redirect" title="Vladimir Iljič Uljanov">Leninove</a> teze in predlagal, da je ves obstoj rezultat protislovja.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Zunaj_formalne_logike">Zunaj formalne logike</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=9" title="Uredi razdelek: Zunaj formalne logike" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=9" title="Urejanje izvorne kode razdelka: Zunaj formalne logike"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Slika:Graham%27s_Hierarchy_of_Disagreement-en.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Graham%27s_Hierarchy_of_Disagreement-en.svg/250px-Graham%27s_Hierarchy_of_Disagreement-en.svg.png" decoding="async" width="250" height="187" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Graham%27s_Hierarchy_of_Disagreement-en.svg/375px-Graham%27s_Hierarchy_of_Disagreement-en.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Graham%27s_Hierarchy_of_Disagreement-en.svg/500px-Graham%27s_Hierarchy_of_Disagreement-en.svg.png 2x" data-file-width="707" data-file-height="530" /></a><figcaption>Protislovje na <a href="/w/index.php?title=Paul_Graham_(ra%C4%8Dunalni%C5%A1ki_programer)&amp;action=edit&amp;redlink=1" class="new" title="Paul Graham (računalniški programer) (stran ne obstaja)">Grahamovi</a> hierarhiji nesoglasij</figcaption></figure> <p><a href="/w/index.php?title=Pogovorni_jezik&amp;action=edit&amp;redlink=1" class="new" title="Pogovorni jezik (stran ne obstaja)">Pogovorna</a> raba lahko označuje akcije ali izjave, ki so si med seboj v naprotju, kadar so (ali so razumljene) kot posledica <a href="/w/index.php?title=Presupozicija&amp;action=edit&amp;redlink=1" class="new" title="Presupozicija (stran ne obstaja)">presupozicij</a>, ki so protislovne v logičnem smislu. </p> <div class="mw-heading mw-heading2"><h2 id="Glej_tudi">Glej tudi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=10" title="Uredi razdelek: Glej tudi" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=10" title="Urejanje izvorne kode razdelka: Glej tudi"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Antinomija" class="mw-redirect" title="Antinomija">antinomija</a></li> <li><a href="/w/index.php?title=Argument_Clinic&amp;action=edit&amp;redlink=1" class="new" title="Argument Clinic (stran ne obstaja)">Argument Clinic</a>, skeč skupine <a href="/wiki/Monty_Python" title="Monty Python">Monty Python</a> v katerem dva diskutanta pri svojem prerekanju rabita le ponavljajoča se protislovja</li> <li><a href="/w/index.php?title=Nasprotnost&amp;action=edit&amp;redlink=1" class="new" title="Nasprotnost (stran ne obstaja)">nasprotnost</a></li> <li><a href="/wiki/Dvojno_merilo" title="Dvojno merilo">dvojno merilo</a></li> <li><a href="/w/index.php?title=Dvomiselnost&amp;action=edit&amp;redlink=1" class="new" title="Dvomiselnost (stran ne obstaja)">dvomiselnost</a></li> <li><a href="/wiki/Ironija" title="Ironija">ironija</a></li> <li><a href="/wiki/Oksimoron" title="Oksimoron">oksimoron</a></li> <li><a href="/w/index.php?title=Parakonsistentna_logika&amp;action=edit&amp;redlink=1" class="new" title="Parakonsistentna logika (stran ne obstaja)">parakonsistentna logika</a></li> <li><a href="/wiki/Paradoks" title="Paradoks">paradoks</a></li> <li><a href="/w/index.php?title=Tavtologija&amp;action=edit&amp;redlink=1" class="new" title="Tavtologija (stran ne obstaja)">tavtologija</a></li> <li><a href="/wiki/TRIZ" title="TRIZ">TRIZ</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Sklici">Sklici</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=11" title="Uredi razdelek: Sklici" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=11" title="Urejanje izvorne kode razdelka: Sklici"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist columns references-column-width" style="column-width: 25em; list-style-type: decimal;"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r5980307">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"»""«""›""‹"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free a,.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited a,.mw-parser-output .id-lock-registration a,.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription a,.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:#d33}.mw-parser-output .cs1-visible-error{color:#d33}.mw-parser-output .cs1-maint{display:none;color:#3a3;margin-left:0.3em}.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.fran.si/iskanje?View=1&amp;Query=protislovje">»protislovje«</a>. <i><a href="/wiki/Fran_(jezikovni_portal)" title="Fran (jezikovni portal)">portal Fran</a> 4.1</i>. 25. maj 2017<span class="reference-accessdate">. Pridobljeno 25. julija 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=neznano&amp;rft.jtitle=portal+Fran+4.1&amp;rft.atitle=protislovje&amp;rft.date=2017-05-25&amp;rft_id=http%3A%2F%2Fwww.fran.si%2Fiskanje%3FView%3D1%26Query%3Dprotislovje&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.fran.si/iskanje?View=1&amp;Query=kontradikcija">»kontradikcija«</a>. <i>portal Fran 4.1</i>. 25. maj 2017<span class="reference-accessdate">. Pridobljeno 25. julija 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=neznano&amp;rft.jtitle=portal+Fran+4.1&amp;rft.atitle=kontradikcija&amp;rft.date=2017-05-25&amp;rft_id=http%3A%2F%2Fwww.fran.si%2Fiskanje%3FView%3D1%26Query%3Dkontradikcija&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFTavzes2002"> Tavzes (2002)</a>, str. 607.</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.fran.si/iskanje?View=1&amp;Query=antinomija">»antinomija«</a>. <i>portal Fran 4.1</i>. 25. maj 2017<span class="reference-accessdate">. Pridobljeno 25. julija 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=neznano&amp;rft.jtitle=portal+Fran+4.1&amp;rft.atitle=antinomija&amp;rft.date=2017-05-25&amp;rft_id=http%3A%2F%2Fwww.fran.si%2Fiskanje%3FView%3D1%26Query%3Dantinomija&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFTavzes2002"> Tavzes (2002)</a>, str. 55.</span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.fran.si/iskanje?View=1&amp;Query=protire%C4%8Dje">»protirečje«</a>. <i>portal Fran 4.1</i>. 25. maj 2017<span class="reference-accessdate">. Pridobljeno 25. julija 2017</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=neznano&amp;rft.jtitle=portal+Fran+4.1&amp;rft.atitle=protire%C4%8Dje&amp;rft.date=2017-05-25&amp;rft_id=http%3A%2F%2Fwww.fran.si%2Fiskanje%3FView%3D1%26Query%3Dprotire%25C4%258Dje&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">↑</a></span> <span class="reference-text">Dialog <i>Euthydemus</i> iz <i>The Dialogs of Plato v prevodu <a href="/w/index.php?title=Benjamin_Jowett&amp;action=edit&amp;redlink=1" class="new" title="Benjamin Jowett (stran ne obstaja)">Benjamina Jowetta</a></i> v: Knjiga 7 <i>Plato</i>: <a href="/w/index.php?title=Robert_Maynard_Hutchins&amp;action=edit&amp;redlink=1" class="new" title="Robert Maynard Hutchins (stran ne obstaja)">Robert Maynard Hutchins</a>, glavni urednik, 1952, <i><a href="/w/index.php?title=Great_Books_of_the_Western_World&amp;action=edit&amp;redlink=1" class="new" title="Great Books of the Western World (stran ne obstaja)">Great Books of the Western World</a></i>, <a href="/wiki/Enciklopedija_Britannica" title="Enciklopedija Britannica">Enciklopedija Britannica</a>, Inc., <a href="/wiki/Chicago" title="Chicago">Chicago</a>.</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><a href="#cite_ref-8">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFPakin2017"> Pakin (2017)</a>.</span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><a href="#cite_ref-9">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFPost1921"> Post (1921)</a> v <a class="mw-selflink-fragment" href="#CITEREFvan_Heijenoort1967"> van Heijenoort (1967)</a>, str. 272.</span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><a href="#cite_ref-10">↑</a></span> <span class="reference-text">krepko in ležeče dodano, <a class="mw-selflink-fragment" href="#CITEREFNagelNewman1958"> Nagel; Newman (1958)</a>, str. 109-110.</span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><a href="#cite_ref-11">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFNagelNewman1958"> Nagel; Newman (1958)</a>, str. 110-111.</span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><a href="#cite_ref-12">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFNagelNewman1958"> Nagel; Newman (1958)</a>, str. 111.</span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><a href="#cite_ref-13">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFPriest2006"> Priest (2006)</a>.</span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><a href="#cite_ref-14">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFStoljar2006"> Stoljar (2006)</a>, str. 87.</span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><a href="#cite_ref-15">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFSørensen2006"> Sørensen (2006)</a>.</span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><a href="#cite_ref-16">↑</a></span> <span class="reference-text"><a class="mw-selflink-fragment" href="#CITEREFMao_Cetung1937"> Mao Cetung (1937)</a>.</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Viri">Viri</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protislovje&amp;veaction=edit&amp;section=12" title="Uredi razdelek: Viri" class="mw-editsection-visualeditor"><span>uredi</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protislovje&amp;action=edit&amp;section=12" title="Urejanje izvorne kode razdelka: Viri"><span>uredi kodo</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r5453066">.mw-parser-output .refbegin{font-size:90%;margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li{margin-left:0;padding-left:3.2em;text-indent:-3.2em}.mw-parser-output .refbegin-hanging-indents ul,.mw-parser-output .refbegin-hanging-indents ul li{list-style:none}@media(max-width:720px){.mw-parser-output .refbegin-hanging-indents>ul>li{padding-left:1.6em;text-indent:-1.6em}}.mw-parser-output .refbegin-100{font-size:100%}.mw-parser-output .refbegin-columns{margin-top:0.3em}.mw-parser-output .refbegin-columns dl,.mw-parser-output .refbegin-columns ol,.mw-parser-output .refbegin-columns ul{margin-top:0}.mw-parser-output .refbegin-columns li,.mw-parser-output .refbegin-columns dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="refbegin refbegin-columns references-column-count references-column-count-2" style="column-count: 2;"> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFvan_Heijenoort1967" class="citation cs2">van Heijenoort, Jean (1967), <i>From Frege to Gödel: A Source Book in Mathematical Logic 1879-1931</i>, Cambridge, MA: Harvard University Press, <a href="/wiki/ISBN_(identifikator)" class="mw-redirect" title="ISBN (identifikator)">ISBN</a>&#160;<a href="/wiki/Posebno:ViriKnjig/0-674-32449-8" title="Posebno:ViriKnjig/0-674-32449-8"><bdi>0-674-32449-8</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=From+Frege+to+G%C3%B6del%3A+A+Source+Book+in+Mathematical+Logic+1879-1931&amp;rft.place=Cambridge%2C+MA&amp;rft.pub=Harvard+University+Press&amp;rft.date=1967&amp;rft.isbn=0-674-32449-8&amp;rft.aulast=van+Heijenoort&amp;rft.aufirst=Jean&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFMao_Cetung1937" class="citation cs2 cs1-prop-foreign-lang-source"><a href="/wiki/Mao_Cetung" title="Mao Cetung">Mao Cetung</a> (Avgust 1937), <a rel="nofollow" class="external text" href="https://www.marxists.org/reference/archive/mao/selected-works/volume-1/mswv1_17.htm"><i>Selected Works of Mao Tse-tung: ON CONTRADICTION</i></a> (v angleščini)</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=Selected+Works+of+Mao+Tse-tung%3A+ON+CONTRADICTION&amp;rft.date=1937-08&amp;rft.au=Mao+Cetung&amp;rft_id=http%3A%2F%2Fwww.marxists.org%2Freference%2Farchive%2Fmao%2Fselected-works%2Fvolume-1%2Fmswv1_17.htm&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFNagelNewman1958" class="citation cs2"><a href="/w/index.php?title=Ernest_Nagel&amp;action=edit&amp;redlink=1" class="new" title="Ernest Nagel (stran ne obstaja)">Nagel, Ernest</a>; <a href="/w/index.php?title=James_Roy_Newman_1958&amp;action=edit&amp;redlink=1" class="new" title="James Roy Newman 1958 (stran ne obstaja)">Newman, James Roy</a> (1958), <i>Gödel's Proof</i>, New York University Press, Card Catalog Number: 58-5610</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=G%C3%B6del%27s+Proof&amp;rft.pub=New+York+University+Press&amp;rft.date=1958&amp;rft.aulast=Nagel&amp;rft.aufirst=Ernest&amp;rft.au=Newman%2C+James+Roy&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFPakin2017" class="citation cs2 cs1-prop-foreign-lang-source">Pakin, Scott (19. januar 2017), <a rel="nofollow" class="external text" href="http://www.ctan.org/tex-archive/info/symbols/comprehensive/symbols-a4.pdf"><i>The Comprehensive LaTeX Symbol List</i></a> <span class="cs1-format">(PDF)</span> (v angleščini)<span class="reference-accessdate">, pridobljeno 26. julija 2017</span></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=The+Comprehensive+LaTeX+Symbol+List&amp;rft.date=2017-01-19&amp;rft.aulast=Pakin&amp;rft.aufirst=Scott&amp;rft_id=http%3A%2F%2Fwww.ctan.org%2Ftex-archive%2Finfo%2Fsymbols%2Fcomprehensive%2Fsymbols-a4.pdf&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFPriest2006" class="citation cs2"><a href="/w/index.php?title=Graham_Priest&amp;action=edit&amp;redlink=1" class="new" title="Graham Priest (stran ne obstaja)">Priest, Graham</a> (2006), <a rel="nofollow" class="external text" href="https://books.google.si/books?id=TMztJKtWWSAC"><i>In Contradiction: A Study of the Transconsistent</i></a> (2.&#160;izd.), Oxford University Press, <a href="/wiki/ISBN_(identifikator)" class="mw-redirect" title="ISBN (identifikator)">ISBN</a>&#160;<a href="/wiki/Posebno:ViriKnjig/0-19-926330-2" title="Posebno:ViriKnjig/0-19-926330-2"><bdi>0-19-926330-2</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=In+Contradiction%3A+A+Study+of+the+Transconsistent&amp;rft.edition=2.&amp;rft.pub=Oxford+University+Press&amp;rft.date=2006&amp;rft.isbn=0-19-926330-2&amp;rft.aulast=Priest&amp;rft.aufirst=Graham&amp;rft_id=https%3A%2F%2Fbooks.google.si%2Fbooks%3Fid%3DTMztJKtWWSAC&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFPost1921" class="citation cs2"><a href="/w/index.php?title=Emil_Leon_Post&amp;action=edit&amp;redlink=1" class="new" title="Emil Leon Post (stran ne obstaja)">Post, Emil Leon</a> (1921), <i>Introduction to a general theory of elementary propositions</i></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=Introduction+to+a+general+theory+of+elementary+propositions&amp;rft.date=1921&amp;rft.aulast=Post&amp;rft.aufirst=Emil+Leon&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFSørensen2006" class="citation cs2 cs1-prop-foreign-lang-source">Sørensen, Michael Kuur (2006), <a rel="nofollow" class="external text" href="https://journals.aau.dk/index.php/ijis/article/download/181/121"><i>CAPITAL AND LABOUR: CAN THE CONFLICT BE SOLVED?</i></a> (v angleščini)<span class="reference-accessdate">, pridobljeno 28. maja 2017</span></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=CAPITAL+AND+LABOUR%3A+CAN+THE+CONFLICT+BE+SOLVED%3F&amp;rft.date=2006&amp;rft.aulast=S%C3%B8rensen&amp;rft.aufirst=Michael+Kuur&amp;rft_id=https%3A%2F%2Fjournals.aau.dk%2Findex.php%2Fijis%2Farticle%2Fdownload%2F181%2F121&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFStoljar2006" class="citation cs2">Stoljar, Daniel (2006), <i>Ignorance and Imagination</i>, Oxford University Press - U.S., <a href="/wiki/ISBN_(identifikator)" class="mw-redirect" title="ISBN (identifikator)">ISBN</a>&#160;<a href="/wiki/Posebno:ViriKnjig/0-19-530658-9" title="Posebno:ViriKnjig/0-19-530658-9"><bdi>0-19-530658-9</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=knjiga&amp;rft.btitle=Ignorance+and+Imagination&amp;rft.pub=Oxford+University+Press+-+U.S.&amp;rft.date=2006&amp;rft.isbn=0-19-530658-9&amp;rft.aulast=Stoljar&amp;rft.aufirst=Daniel&amp;rfr_id=info%3Asid%2Fsl.wikipedia.org%3AProtislovje" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r5980307"><cite id="CITEREFTavzes2002" class="citation cs2"><a href="/w/index.php?title=Milo%C5%A1_Tavzes&amp;action=edit&amp;redlink=1" class="new" title="Miloš Tavzes (stran ne obstaja)">Tavzes, Miloš</a>, ur. 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