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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-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="Aparença"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page'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="Aparença" > <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">Aparença</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&utm_medium=sidebar&utm_campaign=C13_ca.wikipedia.org&uselang=ca" class=""><span>Donatius</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=Especial:Crea_compte&returnto=Teoria" title="Us animem a crear un compte i iniciar una sessió, encara que no és obligatori" class=""><span>Crea un compte</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=Especial:Registre_i_entrada&returnto=Teoria" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o" class=""><span>Inicia la sessió</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="Més opcions" > <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="Eines personals" > <label 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[n]" accesskey="n"><span>Discussió per aquest IP</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"></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="Lloc"> <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="Contingut" 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">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</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">Inici</div> </a> </li> <li id="toc-Característiques" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Característiques"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Característiques</span> </div> </a> <ul id="toc-Característiques-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mètode_científic" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Mètode_científic"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Mètode científic</span> </div> </a> <ul id="toc-Mètode_científic-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Matemàtiques" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Matemàtiques"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Matemàtiques</span> </div> </a> <ul id="toc-Matemàtiques-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referències" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referències"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Referències</span> </div> </a> <ul id="toc-Referències-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vegeu_també" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vegeu_també"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Vegeu també</span> </div> </a> <ul id="toc-Vegeu_també-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="Contingut" 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="Commuta la taula de continguts." > <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">Commuta la taula de continguts.</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">Teoria</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="Vés a un article en una altra llengua. Disponible en 93 llengües" > <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-93" 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">93 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Teorie" title="Teorie - afrikaans" lang="af" hreflang="af" data-title="Teorie" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Theorie" title="Theorie - alemany suís" lang="gsw" hreflang="gsw" data-title="Theorie" data-language-autonym="Alemannisch" data-language-local-name="alemany suís" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8A%85%E1%88%8D%E1%8B%AE%E1%89%B5" title="ኅልዮት - amhàric" lang="am" hreflang="am" data-title="ኅልዮት" data-language-autonym="አማርኛ" data-language-local-name="amhàric" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Teor%C3%ADa" title="Teoría - aragonès" lang="an" hreflang="an" data-title="Teoría" data-language-autonym="Aragonés" data-language-local-name="aragonès" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%86%D8%B8%D8%B1%D9%8A%D8%A9" title="نظرية - àrab" lang="ar" hreflang="ar" data-title="نظرية" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D9%86%D8%B6%D8%B1%D9%8A%D8%A9" title="نضرية - Moroccan Arabic" lang="ary" hreflang="ary" data-title="نضرية" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Teor%C3%ADa" title="Teoría - asturià" lang="ast" hreflang="ast" data-title="Teoría" data-language-autonym="Asturianu" data-language-local-name="asturià" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/N%C9%99z%C9%99riyy%C9%99" title="Nəzəriyyə - azerbaidjanès" lang="az" hreflang="az" data-title="Nəzəriyyə" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaidjanès" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B8%D1%8F" title="Теория - baixkir" lang="ba" hreflang="ba" data-title="Теория" data-language-autonym="Башҡортса" data-language-local-name="baixkir" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A2%D1%8D%D0%BE%D1%80%D1%8B%D1%8F" title="Тэорыя - belarús" lang="be" hreflang="be" data-title="Тэорыя" data-language-autonym="Беларуская" data-language-local-name="belarús" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A2%D1%8D%D0%BE%D1%80%D1%8B%D1%8F" title="Тэорыя - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Тэорыя" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B8%D1%8F" title="Теория - búlgar" lang="bg" hreflang="bg" data-title="Теория" data-language-autonym="Български" data-language-local-name="búlgar" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%A5%E0%A4%BF%E0%A4%AF%E0%A4%B0%E0%A5%80" title="थियरी - Bhojpuri" lang="bh" hreflang="bh" data-title="थियरी" data-language-autonym="भोजपुरी" data-language-local-name="Bhojpuri" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A4%E0%A6%A4%E0%A7%8D%E0%A6%A4%E0%A7%8D%E0%A6%AC" title="তত্ত্ব - bengalí" lang="bn" hreflang="bn" data-title="তত্ত্ব" data-language-autonym="বাংলা" data-language-local-name="bengalí" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Teorija" title="Teorija - bosnià" lang="bs" hreflang="bs" data-title="Teorija" data-language-autonym="Bosanski" data-language-local-name="bosnià" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%AA%DB%8C%DB%86%D8%B1%DB%8C" title="تیۆری - kurd central" lang="ckb" hreflang="ckb" data-title="تیۆری" data-language-autonym="کوردی" data-language-local-name="kurd central" 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/Teorie" title="Teorie - txec" lang="cs" hreflang="cs" data-title="Teorie" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B8" title="Теори - txuvaix" lang="cv" hreflang="cv" data-title="Теори" data-language-autonym="Чӑвашла" data-language-local-name="txuvaix" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Teori" title="Teori - danès" lang="da" hreflang="da" data-title="Teori" data-language-autonym="Dansk" data-language-local-name="danès" 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/Theorie" title="Theorie - alemany" lang="de" hreflang="de" data-title="Theorie" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%98%CE%B5%CF%89%CF%81%CE%AF%CE%B1" title="Θεωρία - grec" lang="el" hreflang="el" data-title="Θεωρία" data-language-autonym="Ελληνικά" data-language-local-name="grec" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Theory" title="Theory - anglès" lang="en" hreflang="en" data-title="Theory" data-language-autonym="English" data-language-local-name="anglès" 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/Teorio" title="Teorio - esperanto" lang="eo" hreflang="eo" data-title="Teorio" 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/Teor%C3%ADa" title="Teoría - espanyol" lang="es" hreflang="es" data-title="Teoría" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Teooria" title="Teooria - estonià" lang="et" hreflang="et" data-title="Teooria" data-language-autonym="Eesti" data-language-local-name="estonià" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Teoria" title="Teoria - basc" lang="eu" hreflang="eu" data-title="Teoria" data-language-autonym="Euskara" data-language-local-name="basc" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%86%D8%B8%D8%B1%DB%8C%D9%87" title="نظریه - persa" lang="fa" hreflang="fa" data-title="نظریه" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Teoria" title="Teoria - finès" lang="fi" hreflang="fi" data-title="Teoria" data-language-autonym="Suomi" data-language-local-name="finès" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Th%C3%A9orie" title="Théorie - francès" lang="fr" hreflang="fr" data-title="Théorie" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Teoiric" title="Teoiric - irlandès" lang="ga" hreflang="ga" data-title="Teoiric" data-language-autonym="Gaeilge" data-language-local-name="irlandès" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%AA%D7%90%D7%95%D7%A8%D7%99%D7%94" title="תאוריה - hebreu" lang="he" hreflang="he" data-title="תאוריה" data-language-autonym="עברית" data-language-local-name="hebreu" 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%B8%E0%A4%BF%E0%A4%A6%E0%A5%8D%E0%A4%A7%E0%A4%BE%E0%A4%82%E0%A4%A4_(%E0%A4%A5%E0%A4%BF%E0%A4%85%E0%A4%B0%E0%A5%80)" title="सिद्धांत (थिअरी) - hindi" lang="hi" hreflang="hi" data-title="सिद्धांत (थिअरी)" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Teorija" title="Teorija - croat" lang="hr" hreflang="hr" data-title="Teorija" data-language-autonym="Hrvatski" data-language-local-name="croat" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Teyori" title="Teyori - crioll d’Haití" lang="ht" hreflang="ht" data-title="Teyori" data-language-autonym="Kreyòl ayisyen" data-language-local-name="crioll d’Haití" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Elm%C3%A9let" title="Elmélet - hongarès" lang="hu" hreflang="hu" data-title="Elmélet" data-language-autonym="Magyar" data-language-local-name="hongarès" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8F%D5%A5%D5%BD%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6" title="Տեսություն - armeni" lang="hy" hreflang="hy" data-title="Տեսություն" data-language-autonym="Հայերեն" data-language-local-name="armeni" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Theoria" title="Theoria - interlingua" lang="ia" hreflang="ia" data-title="Theoria" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Teori" title="Teori - indonesi" lang="id" hreflang="id" data-title="Teori" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesi" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Teorio" title="Teorio - ido" lang="io" hreflang="io" data-title="Teorio" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Teoria" title="Teoria - italià" lang="it" hreflang="it" data-title="Teoria" data-language-autonym="Italiano" data-language-local-name="italià" 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%90%86%E8%AB%96" title="理論 - japonès" lang="ja" hreflang="ja" data-title="理論" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%97%E1%83%94%E1%83%9D%E1%83%A0%E1%83%98%E1%83%90" title="თეორია - georgià" lang="ka" hreflang="ka" data-title="თეორია" data-language-autonym="ქართული" data-language-local-name="georgià" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B8%D1%8F" title="Теория - kazakh" lang="kk" hreflang="kk" data-title="Теория" data-language-autonym="Қазақша" data-language-local-name="kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%B8%E0%B2%BF%E0%B2%A6%E0%B3%8D%E0%B2%A7%E0%B2%BE%E0%B2%82%E0%B2%A4" title="ಸಿದ್ಧಾಂತ - kannada" lang="kn" hreflang="kn" data-title="ಸಿದ್ಧಾಂತ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9D%B4%EB%A1%A0" title="이론 - coreà" lang="ko" hreflang="ko" data-title="이론" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Teor%C3%AE" title="Teorî - kurd" lang="ku" hreflang="ku" data-title="Teorî" data-language-autonym="Kurdî" data-language-local-name="kurd" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B8%D1%8F" title="Теория - kirguís" lang="ky" hreflang="ky" data-title="Теория" data-language-autonym="Кыргызча" data-language-local-name="kirguís" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Theoria" title="Theoria - llatí" lang="la" hreflang="la" data-title="Theoria" data-language-autonym="Latina" data-language-local-name="llatí" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Theorie" title="Theorie - limburguès" lang="li" hreflang="li" data-title="Theorie" data-language-autonym="Limburgs" data-language-local-name="limburguès" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Teorija" title="Teorija - lituà" lang="lt" hreflang="lt" data-title="Teorija" data-language-autonym="Lietuvių" data-language-local-name="lituà" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Teorija" title="Teorija - letó" lang="lv" hreflang="lv" data-title="Teorija" data-language-autonym="Latviešu" data-language-local-name="letó" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Rijan-kevitra" title="Rijan-kevitra - malgaix" lang="mg" hreflang="mg" data-title="Rijan-kevitra" data-language-autonym="Malagasy" data-language-local-name="malgaix" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B8%D1%98%D0%B0" title="Теорија - macedoni" lang="mk" hreflang="mk" data-title="Теорија" data-language-autonym="Македонски" data-language-local-name="macedoni" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%9E%D0%BD%D0%BE%D0%BB" title="Онол - mongol" lang="mn" hreflang="mn" data-title="Онол" data-language-autonym="Монгол" data-language-local-name="mongol" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Teori" title="Teori - malai" lang="ms" hreflang="ms" data-title="Teori" data-language-autonym="Bahasa Melayu" data-language-local-name="malai" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%9E%E1%80%AE%E1%80%A1%E1%80%AD%E1%80%AF%E1%80%9B%E1%80%AE" title="သီအိုရီ - birmà" lang="my" hreflang="my" data-title="သီအိုရီ" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmà" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Theorie" title="Theorie - neerlandès" lang="nl" hreflang="nl" data-title="Theorie" data-language-autonym="Nederlands" data-language-local-name="neerlandès" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Teori" title="Teori - noruec nynorsk" lang="nn" hreflang="nn" data-title="Teori" data-language-autonym="Norsk nynorsk" data-language-local-name="noruec nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Teori" title="Teori - noruec bokmål" lang="nb" hreflang="nb" data-title="Teori" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%A5%E0%A8%BF%E0%A8%8A%E0%A8%B0%E0%A9%80" title="ਥਿਊਰੀ - panjabi" lang="pa" hreflang="pa" data-title="ਥਿਊਰੀ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="panjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Teoria" title="Teoria - polonès" lang="pl" hreflang="pl" data-title="Teoria" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%86%D8%B8%D8%B1%DB%8C%D9%87" title="نظریه - paixtu" lang="ps" hreflang="ps" data-title="نظریه" data-language-autonym="پښتو" data-language-local-name="paixtu" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Teoria" title="Teoria - portuguès" lang="pt" hreflang="pt" data-title="Teoria" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/%C3%91asa" title="Ñasa - quítxua" lang="qu" hreflang="qu" data-title="Ñasa" data-language-autonym="Runa Simi" data-language-local-name="quítxua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Teorie" title="Teorie - romanès" lang="ro" hreflang="ro" data-title="Teorie" data-language-autonym="Română" data-language-local-name="romanès" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D0%B8%D1%8F" title="Теория - rus" lang="ru" hreflang="ru" data-title="Теория" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BE%D1%80%D1%96%D1%8F" title="Теорія - Rusyn" lang="rue" hreflang="rue" data-title="Теорія" data-language-autonym="Русиньскый" data-language-local-name="Rusyn" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Tiur%C3%ACa" title="Tiurìa - sicilià" lang="scn" hreflang="scn" data-title="Tiurìa" data-language-autonym="Sicilianu" data-language-local-name="sicilià" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D9%86%D8%B8%D8%B1%D9%8A%D9%88" title="نظريو - sindi" lang="sd" hreflang="sd" data-title="نظريو" data-language-autonym="سنڌي" data-language-local-name="sindi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Teorija" title="Teorija - serbocroat" lang="sh" hreflang="sh" data-title="Teorija" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbocroat" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Te%C3%B3ria" title="Teória - eslovac" lang="sk" hreflang="sk" data-title="Teória" data-language-autonym="Slovenčina" data-language-local-name="eslovac" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Teorija" title="Teorija - eslovè" lang="sl" hreflang="sl" data-title="Teorija" data-language-autonym="Slovenščina" data-language-local-name="eslovè" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Gorokodzwa" title="Gorokodzwa - shona" lang="sn" hreflang="sn" data-title="Gorokodzwa" data-language-autonym="ChiShona" data-language-local-name="shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Teoria" title="Teoria - albanès" lang="sq" hreflang="sq" data-title="Teoria" data-language-autonym="Shqip" data-language-local-name="albanès" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Teorija" title="Teorija - serbi" lang="sr" hreflang="sr" data-title="Teorija" data-language-autonym="Српски / srpski" data-language-local-name="serbi" 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/Teori" title="Teori - suec" lang="sv" hreflang="sv" data-title="Teori" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Nadharia" title="Nadharia - suahili" lang="sw" hreflang="sw" data-title="Nadharia" data-language-autonym="Kiswahili" data-language-local-name="suahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%95%E0%AF%8A%E0%AE%B3%E0%AF%8D%E0%AE%95%E0%AF%88" title="கொள்கை - tàmil" lang="ta" hreflang="ta" data-title="கொள்கை" data-language-autonym="தமிழ்" data-language-local-name="tàmil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%B8%E0%B0%BF%E0%B0%A6%E0%B1%8D%E0%B0%A7%E0%B0%BE%E0%B0%82%E0%B0%A4%E0%B0%82" title="సిద్ధాంతం - telugu" lang="te" hreflang="te" data-title="సిద్ధాంతం" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%97%E0%B8%A4%E0%B8%A9%E0%B8%8E%E0%B8%B5" title="ทฤษฎี - tai" lang="th" hreflang="th" data-title="ทฤษฎี" data-language-autonym="ไทย" data-language-local-name="tai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Teorya" title="Teorya - tagal" lang="tl" hreflang="tl" data-title="Teorya" data-language-autonym="Tagalog" data-language-local-name="tagal" 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/Teori" title="Teori - turc" lang="tr" hreflang="tr" data-title="Teori" data-language-autonym="Türkçe" data-language-local-name="turc" 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%A2%D0%B5%D0%BE%D1%80%D1%96%D1%8F" title="Теорія - ucraïnès" lang="uk" hreflang="uk" data-title="Теорія" data-language-autonym="Українська" data-language-local-name="ucraïnès" 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/%D9%86%D8%B8%D8%B1%DB%8C%DB%81" title="نظریہ - urdú" lang="ur" hreflang="ur" data-title="نظریہ" data-language-autonym="اردو" data-language-local-name="urdú" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Nazariya" title="Nazariya - uzbek" lang="uz" hreflang="uz" data-title="Nazariya" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/L%C3%BD_thuy%E1%BA%BFt" title="Lý thuyết - vietnamita" lang="vi" hreflang="vi" data-title="Lý thuyết" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Teyorya" title="Teyorya - waray" lang="war" hreflang="war" data-title="Teyorya" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E7%90%86%E8%AE%BA" title="理论 - xinès wu" lang="wuu" hreflang="wuu" data-title="理论" data-language-autonym="吴语" data-language-local-name="xinès wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%98%D7%A2%D7%90%D7%A8%D7%99%D7%A2" title="טעאריע - ídix" lang="yi" hreflang="yi" data-title="טעאריע" data-language-autonym="ייִדיש" data-language-local-name="ídix" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%90%86%E8%AB%96" title="理論 - xinès" lang="zh" hreflang="zh" data-title="理論" data-language-autonym="中文" data-language-local-name="xinès" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/L%C3%AD-l%C5%ABn" title="Lí-lūn - xinès min del sud" lang="nan" hreflang="nan" data-title="Lí-lūn" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="xinès min del sud" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E7%90%86%E8%AB%96" title="理論 - cantonès" lang="yue" hreflang="yue" data-title="理論" data-language-autonym="粵語" data-language-local-name="cantonès" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/Umchaciso" title="Umchaciso - zulu" lang="zu" hreflang="zu" data-title="Umchaciso" data-language-autonym="IsiZulu" data-language-local-name="zulu" class="interlanguage-link-target"><span>IsiZulu</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/Q17737#sitelinks-wikipedia" title="Modifica enllaços interlingües" class="wbc-editpage">Modifica els enllaços</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="Espais de noms"> <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/Teoria" title="Vegeu el contingut de la pàgina [c]" accesskey="c"><span>Pàgina</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discussi%C3%B3:Teoria&action=edit&redlink=1" rel="discussion" class="new" title="Discussió sobre el contingut d'aquesta pàgina (encara no existeix) [t]" accesskey="t"><span>Discussió</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="Canvia la variant de llengua" > <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" 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class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">amaga</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">De la Viquipèdia, l'enciclopèdia lliure</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="ca" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r34261971">.mw-parser-output .hatnote{width:100%;border-color:#77ccff;color:var(--color-base,#202122);background-color:#f5f5f5;margin-bottom:1em;font-style:italic}.mw-parser-output .hatnote i{font-style:normal}@media screen{html.skin-theme-clientpref-night .mw-parser-output .hatnote{color:var(--color-inverted,#fff);background-color:var(--background-color-inverted,#101418)}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .hatnote{color:var(--color-inverted,#fff);background-color:var(--background-color-inverted,#101418)}}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style> <table class="hatnote" cellspacing="5"> <tbody><tr> <td style="width: 25px; vertical-align: top;"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/22px-Disambig_grey.svg.png" decoding="async" width="22" height="17" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/33px-Disambig_grey.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/44px-Disambig_grey.svg.png 2x" data-file-width="260" data-file-height="200" /></span></span> </td> <td>«<b>Teòric</b>» redirigeix aquí. Vegeu-ne altres significats a «<a href="/wiki/Te%C3%B2ricon" title="Teòricon">Teòricon</a>». </td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r34261971"> <table class="hatnote" cellspacing="5"> <tbody><tr> <td style="width: 25px; vertical-align: top;"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Confusion_grey.svg/22px-Confusion_grey.svg.png" decoding="async" width="22" height="17" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Confusion_grey.svg/33px-Confusion_grey.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Confusion_grey.svg/44px-Confusion_grey.svg.png 2x" data-file-width="260" data-file-height="200" /></span></span> </td> <td>No s'ha de confondre amb <a href="/wiki/Teorema" title="Teorema">teorema</a>. </td></tr></tbody></table> <p>Una <b>teoria</b> és un tipus racional de <a href="/wiki/Pensament" title="Pensament">pensament abstracte</a> sobre un <a href="/wiki/Fenomen" title="Fenomen">fenomen</a>, o els resultats d'aquest pensament. El procés de pensament contemplatiu i racional s'associa sovint amb processos com l'estudi observacional o la <a href="/wiki/Investigaci%C3%B3" title="Investigació">investigació</a>. Les teories poden ser <a href="/wiki/Teoria_cient%C3%ADfica" title="Teoria científica">científiques</a>, pertànyer a una disciplina no científica o a cap disciplina. Depenent del context, les afirmacions d'una teoria poden incloure, per exemple, explicacions generalitzades sobre com funciona la <a href="/wiki/Natura" title="Natura">natura</a>. La paraula té les seves arrels en el <a href="/wiki/Grec_antic" title="Grec antic">grec antic</a>, però en l'ús modern ha adquirit diversos significats relacionats.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>En la <a href="/wiki/Ci%C3%A8ncia" title="Ciència">ciència moderna</a>, el terme "teoria" fa referència a les <a href="/wiki/Teoria_cient%C3%ADfica" title="Teoria científica">teories científiques</a>, un tipus d'explicació de la natura feta d'una manera coherent, seguint el <a href="/wiki/M%C3%A8tode_cient%C3%ADfic" title="Mètode científic">mètode científic</a>, i complint els criteris requerits per la ciència moderna. Aquest tipus de teories es descriuen de tal manera que les proves científiques haurien de poder proporcionar-hi suport empíric, o una contradicció empírica. Les teories científiques són la forma més fiable, rigorosa i completa de <a href="/wiki/Coneixement_cient%C3%ADfic" title="Coneixement científic">coneixement científic</a>, en contrast amb els usos més comuns de la paraula "teoria" que impliquen que alguna cosa no està provada o especulativa (que en termes formals es caracteritza millor per la paraula <a href="/wiki/Hip%C3%B2tesi" title="Hipòtesi">hipòtesi</a>). Les teories científiques es distingeixen de les hipòtesis, en que són <a href="/wiki/Conjectura" title="Conjectura">conjectures</a> individuals comprovables empíricament, i de les <a href="/wiki/Llei_cient%C3%ADfica" title="Llei científica">lleis científiques</a>, que són relats descriptius de la manera com es comporta la natura com una regla i norma constant i invariable de les coses, nascuda de la <a href="/wiki/Causa" class="mw-redirect" title="Causa">causa</a> primera o de les qualitats i condicions d'aquestes.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>Una teoria pot ser un coprus de coneixement, que pot o no estar associat a models explicatius particulars. Teoritzar és desenvolupar aquest corpus de coneixement.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Fora de l'àmbit científic, la paraula teoria o "en teoria"<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> s'utilitza de vegades per referir-se a alguna cosa que el parlant no ha provat. En ciència, aquest mateix concepte es coneix com a <a href="/wiki/Hip%C3%B2tesi" title="Hipòtesi">hipòtesi</a>, i la paraula "hipotèticament" s'utilitza tant dins com fora de la ciència. En el seu ús fora de la ciència, la paraula "teoria" es contrasta molt sovint amb "<a href="/wiki/Pr%C3%A0ctica" title="Pràctica">pràctica</a>" (del grec praxis, πρᾶξις) un terme grec per a fer, que s'oposa a la teoria.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Un "exemple clàssic" de la distinció entre "teòric" i "pràctic" utilitza la disciplina de la medicina: la teoria mèdica implica intentar entendre les causes i la naturalesa de la salut i la malaltia, mentre que la part pràctica de la medicina intenta fer que les persones estiguin sanes. Aquestes dues coses estan relacionades però poden ser independents, perquè és possible investigar la <a href="/wiki/Salut" title="Salut">salut</a> i la malaltia sense curar pacients específics, per exemple.<sup id="cite_ref-mediumthelaw_7-0" class="reference"><a href="#cite_note-mediumthelaw-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Característiques"><span id="Caracter.C3.ADstiques"></span>Característiques</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Teoria&action=edit&section=1" title="Modifica la secció: Característiques"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Les teories són eines analítiques per comprendre, explicar i fer prediccions sobre un tema determinat. Hi ha teories en molts i variats camps d'estudi, incloses les arts i les ciències. Una teoria formal és de naturalesa sintàctica i només té sentit quan se li dóna un component semàntic aplicant-lo a algun contingut (per exemple, fets i relacions del món històric real a mesura que s'està desenvolupant). Les teories de diversos camps d'estudi s'expressen sovint en llenguatge natural, però es poden construir de tal manera que la seva forma general sigui idèntica a una teoria tal com s'expressa en el llenguatge formal de la lògica matemàtica. Les teories es poden expressar matemàticament, simbòlicament o en llenguatge comú, però generalment s'espera que segueixin els principis de pensament racional o <a href="/wiki/L%C3%B2gica" title="Lògica">lògica</a>. </p><p>La teoria es construeix a partir d'un conjunt d'oracions que es creu que són afirmacions vertaderes sobre el tema en qüestió. Tanmateix, la veritat de qualsevol d'aquestes afirmacions és sempre relativa a tota la teoria. Per tant, la mateixa afirmació pot ser certa respecte a una teoria, i no és certa respecte a una altra. Això és, en llenguatge corrent, on afirmacions com "És una persona terrible" no es poden jutjar com a vertaderes o falses sense fer referència a alguna interpretació de qui és "Ell" i, per tant, quina és una "persona terrible" sota la teoria.<sup id="cite_ref-curry_8-0" class="reference"><a href="#cite_note-curry-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>La <a href="/w/index.php?title=Metateoria&action=edit&redlink=1" class="new" title="Metateoria (encara no existeix)">forma de les teories</a> s'estudia formalment en la <a href="/wiki/L%C3%B2gica_matem%C3%A0tica" title="Lògica matemàtica">lògica matemàtica</a>, especialment en la <a href="/wiki/Teoria_de_models" title="Teoria de models">teoria de models</a>. Quan les teories s'estudien en matemàtiques, normalment s'expressen en algun llenguatge formal i els seus enunciats es tanquen sota l'aplicació de certs procediments anomenats <a href="/wiki/Regla_d%27infer%C3%A8ncia" title="Regla d'inferència">regles d'inferència</a>. Un cas especial d'això, una <a href="/w/index.php?title=Teoria_axiom%C3%A0tica&action=edit&redlink=1" class="new" title="Teoria axiomàtica (encara no existeix)">teoria axiomàtica</a>, consisteix en <a href="/wiki/Axioma" title="Axioma">axiomes</a> (o esquemes d'axiomes) i regles d'inferència. Un <a href="/wiki/Teorema" title="Teorema">teorema</a> és una afirmació que es pot derivar d'aquests axiomes mitjançant l'aplicació d'aquestes regles d'inferència. Les teories utilitzades en aplicacions són abstraccions de fenòmens observats i els teoremes resultants proporcionen solucions a problemes del món real. Alguns exemples evidents inclouen l'<a href="/wiki/Aritm%C3%A8tica" title="Aritmètica">aritmètica</a> (conceptes abstractes de nombre), <a href="/wiki/Geometria" title="Geometria">geometria</a> (conceptes d'espai) i <a href="/wiki/Probabilitat" title="Probabilitat">probabilitat</a> (conceptes d'<a href="/wiki/Variable_aleat%C3%B2ria" title="Variable aleatòria">aleatorietat</a> i probabilitat). </p><p>El <a href="/wiki/Teorema_d%27incompletesa_de_G%C3%B6del" title="Teorema d'incompletesa de Gödel">Teorema d'incompletesa de Gödel</a> mostra que cap teoria consistent i enumerable recursivament (és a dir, una teoria els teoremes de la qual formen un conjunt enumerable recursivament) en la qual es pugui expressar el concepte de nombres naturals, pot incloure totes les afirmacions vertaderes sobre ells.<sup id="cite_ref-kleene1967_9-0" class="reference"><a href="#cite_note-kleene1967-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Com a resultat, alguns dominis del coneixement no es poden formalitzar, amb precisió i completament, com a teories matemàtiques. (Aquí, formalitzar amb precisió i completament vol dir que totes les proposicions vertaderes —i només les proposicions vertaderes— són derivables dins del sistema matemàtic.) Aquesta limitació, però, de cap manera impedeix la construcció de teories matemàtiques que formalitzin grans cossos de coneixement científic. </p> <div class="mw-heading mw-heading2"><h2 id="Mètode_científic"><span id="M.C3.A8tode_cient.C3.ADfic"></span>Mètode científic</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Teoria&action=edit&section=2" title="Modifica la secció: Mètode científic"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>D'acord amb el <a href="/wiki/M%C3%A8tode_cient%C3%ADfic" title="Mètode científic">mètode científic</a>, una teoria ha de poder ser comprovada per l'<a href="/wiki/Experimentaci%C3%B3" class="mw-redirect" title="Experimentació">experimentació</a> o l'<a href="/wiki/Observaci%C3%B3" title="Observació">observació</a>. Si els <a href="/wiki/Fet_(filosofia)" title="Fet (filosofia)">fets</a> prevists per una teoria no poden ser verificats, o apareixen nous fets no prevists en una teoria, seguint sempre els principis del mètode científic, s'ha de canviar la teoria, canviant alguns dels seus <a href="/wiki/Postulat" title="Postulat">postulats</a> o <a href="/wiki/Proposici%C3%B3_(l%C3%B2gica)" title="Proposició (lògica)">proposicions</a>, o afegint-ne de nous. </p><p>S'utilitza el terme <i><a href="/wiki/Conjectura" title="Conjectura">conjectura</a></i> per a referir-se a una <a href="/wiki/Suposici%C3%B3" title="Suposició">suposició</a> que no està suportada per cap <a href="/wiki/Observaci%C3%B3" title="Observació">observació</a>, o <a href="/wiki/Experiment" title="Experiment">experiment</a>. En canvi, una <a href="/wiki/Hip%C3%B2tesi" title="Hipòtesi">hipòtesi</a> té el suport dels experiments, o de l'<a href="/wiki/Observaci%C3%B3" title="Observació">observació</a>.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>Una teoria vàlida es distingeix pel fet que té una lògica interna, és a dir, un <a href="/wiki/Teorema" title="Teorema">teorema</a> no contradiu els altres teoremes, de manera que tot el <a href="/wiki/Conjunt" title="Conjunt">conjunt</a> és coherent segons les regles de la <a href="/wiki/L%C3%B2gica" title="Lògica">lògica</a>. A més, les teories vàlides solen permetre de fer prediccions sobre fenòmens <a href="/wiki/F%C3%ADsic" title="Físic">físics</a> en un àmbit científic determinat. En general, se solen preferir les teories que són més simples i elegants des d'un punt de vista <a href="/wiki/Matem%C3%A0tic" title="Matemàtic">matemàtic</a> (vegeu: el principi de la <a href="/wiki/Navalla_d%27Occam" title="Navalla d'Occam">navalla d'Occam</a>), i les que es poden aplicar a un ventall de fenòmens més ampli. </p> <div class="mw-heading mw-heading2"><h2 id="Matemàtiques"><span id="Matem.C3.A0tiques"></span>Matemàtiques</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Teoria&action=edit&section=3" title="Modifica la secció: Matemàtiques"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En <a href="/wiki/Matem%C3%A0tica" class="mw-redirect" title="Matemàtica">matemàtica</a>, es considera que és un conjunt de proposicions relacionades lògicament. En <a href="/wiki/L%C3%B2gica_matem%C3%A0tica" title="Lògica matemàtica">lògica matemàtica</a>, una teoria és un conjunt d'<a href="/wiki/Axioma" title="Axioma">axiomes</a> i tots els teoremes que se'n poden derivar. El <a href="/wiki/Teorema_d%27incompletesa_de_G%C3%B6del" title="Teorema d'incompletesa de Gödel">teorema d'incompletesa de Gödel</a> diu que cap teoria consistent, amb un nombre finit d'axiomes, no pot contenir totes les proposicions vertaderes. D'una teoria <i>T</i> es diu que és decidible si existeix un <a href="/wiki/Algorisme" title="Algorisme">algorisme</a> que determina si qualsevol proposició donada és o no un teorema de <i>T</i>. Per exemple, la teoria de <a href="/wiki/Grup_abeli%C3%A0" title="Grup abelià">grups abelians</a> és decidible, mentre que la <a href="/wiki/Teoria_de_conjunts" title="Teoria de conjunts">teoria de conjunts</a> és indecidible. </p> <div class="mw-heading mw-heading2"><h2 id="Referències"><span id="Refer.C3.A8ncies"></span>Referències</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Teoria&action=edit&section=4" title="Modifica la secció: Referències"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist {{#if: | references-column-count references-column-count-{{{col}}}" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal"><span style="font-variant: small-caps;">McMurray</span>, Foster «<a rel="nofollow" class="external text" href="https://archive.org/details/sim_educational-theory_1955-07_5_3/page/129">Preface to an Autonomous Discipline of Education</a>». <i>Educational Theory</i>, vol. 5, 3, 7-1955, pàg. 129–140. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1111%2Fj.1741-5446.1955.tb01131.x">10.1111/j.1741-5446.1955.tb01131.x</a>.</span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><span class="citation book" style="font-style:normal">National Academy of Sciences, Institute of Medicine. <a rel="nofollow" class="external text" href="https://archive.org/details/isbn_9780309105866/page/11"><i>Science, evolution, and creationism</i></a>.  Washington, D.C.: National Academies Press, 2008, p. <a rel="nofollow" class="external text" href="https://archive.org/details/isbn_9780309105866/page/11">11</a>. <span style="font-size:90%; white-space:nowrap;"><a href="/wiki/Especial:Fonts_bibliogr%C3%A0fiques/978-0309105866" title="Especial:Fonts bibliogràfiques/978-0309105866">ISBN 978-0309105866</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Science%2C+evolution%2C+and+creationism&rft.au=National+Academy+of+Sciences%2C+Institute+of+Medicine&rft.date=2008&rft.pub=National+Academies+Press&rft.place=Washington%2C+D.C.&rft.pages=%5Bhttps%3A%2F%2Farchive.org%2Fdetails%2Fisbn_9780309105866%2Fpage%2F11+11%5D&rft.isbn=978-0309105866&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fisbn_9780309105866%2Fpage%2F11"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><span class="citation book" style="font-style:normal" id="CITEREFThomas2007"><span style="font-variant: small-caps;">Thomas</span>, Gary. <a rel="nofollow" class="external text" href="https://archive.org/details/educationtheorys0000thom"><i>Education and theory : strangers in paradigms</i></a>.  Maidenhead: Open Univ. Press, 2007. <span style="font-size:90%; white-space:nowrap;"><a href="/wiki/Especial:Fonts_bibliogr%C3%A0fiques/9780335211791" title="Especial:Fonts bibliogràfiques/9780335211791">ISBN 9780335211791</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Education+and+theory+%3A+strangers+in+paradigms&rft.aulast=Thomas&rft.aufirst=Gary&rft.date=2007&rft.pub=Open+Univ.+Press&rft.place=Maidenhead&rft.isbn=9780335211791&rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Feducationtheorys0000thom"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.amnh.org/exhibitions/darwin/evolution-today/what-is-a-theory">What is a Theory?</a>. <a href="/wiki/American_Museum_of_Natural_History" class="mw-redirect" title="American Museum of Natural History">American Museum of Natural History</a>.</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://www.ecured.cu/index.php?title=Teor%C3%ADa">Teoría - EcuRed</a>» (en castellà). [Consulta: 19 agost 2024].</span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://www.treccani.it/enciclopedia/teoria_(Dizionario-di-filosofia)/">Teoria - Enciclopedia</a>» (en italià). [Consulta: 21 agost 2024].</span></span> </li> <li id="cite_note-mediumthelaw-7"><span class="mw-cite-backlink"><a href="#cite_ref-mediumthelaw_7-0">↑</a></span> <span class="reference-text">David J Pfeiffer. <i><a rel="nofollow" class="external text" href="https://medium.com/science-journal/scientific-theory-vs-scientific-law-5624633a8f1b">Scientific Theory vs Law</a></i>. <a href="/wiki/Science_(journal)" class="mw-redirect" title="Science (journal)">Science Journal</a> (on medium.com). 30 January 2017</span> </li> <li id="cite_note-curry-8"><span class="mw-cite-backlink"><a href="#cite_ref-curry_8-0">↑</a></span> <span class="reference-text">Curry, Haskell, <i>Foundations of Mathematical Logic</i></span> </li> <li id="cite_note-kleene1967-9"><span class="mw-cite-backlink"><a href="#cite_ref-kleene1967_9-0">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal" id="CITEREFKleene1943"><span style="font-variant: small-caps;">Kleene</span>, S. C. «Recursive predicates and quantifiers». <i>Transactions of the American Mathematical Society</i>, 53, 1, 01-01-1943, pàg. 41–41. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1090%2FS0002-9947-1943-0007371-8">10.1090/S0002-9947-1943-0007371-8</a>. <a href="/wiki/ISSN" title="ISSN">ISSN</a>: <a rel="nofollow" class="external text" href="//www.worldcat.org/issn/1088-6850">1088-6850</a>.</span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><a href="#cite_ref-10">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://definicion.de/teoria/">Teoría - Definicion.de</a>» (en castellà). [Consulta: 29 agost 2024].</span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Vegeu_també"><span id="Vegeu_tamb.C3.A9"></span>Vegeu també</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Teoria&action=edit&section=5" title="Modifica la secció: Vegeu també"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <table cellpadding="2" cellspacing="0" align="right" style="margin:5px; padding: 5px; border:1px solid #aaaaaa; text-align:left;" class="infobox noprint plainlinks"> <tbody><tr> <td colspan="2" style="text-align:center; font-size:85%">En altres projectes de <a href="/wiki/Fundaci%C3%B3_Wikimedia" title="Fundació Wikimedia">Wikimedia</a>: </td></tr> <tr> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/Fitxer:Commons-logo.svg" class="mw-file-description" title="Commons"><img alt="Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/17px-Commons-logo.svg.png" decoding="async" width="17" height="23" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/26px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/34px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a><figcaption>Commons</figcaption></figure></td> <td><a href="https://commons.wikimedia.org/wiki/Category:Theories" class="extiw" title="commons:Category:Theories"><b>Commons</b></a> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q17737?uselang=ca#sitelinks-special" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span> </td></tr> <tr> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/Fitxer:Viccionari.png" class="mw-file-description" title="Viccionari"><img alt="Viccionari" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Viccionari.png/17px-Viccionari.png" decoding="async" width="17" height="19" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Viccionari.png/26px-Viccionari.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Viccionari.png/34px-Viccionari.png 2x" data-file-width="450" data-file-height="490" /></a><figcaption>Viccionari</figcaption></figure></td> <td><b><span class="interProject"><a 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