Modus tollens - Simple English Wikipedia, the free encyclopedia

Toggle the table of contents Modus tollens 27 languages Català Čeština Dansk Deutsch Ελληνικά English Español Eesti Euskara فارسی Français עברית Bahasa Indonesia Íslenska Italiano 日本語 한국어 Nederlands Polski Português Русский Srpskohrvatski / српскохрватски Slovenčina Српски / srpski Svenska Українська 中文 Change links Page Talk English Read Change Change source View history Tools Tools move to sidebar hide Actions Read Change Change source View history General What links here Related changes Upload file Permanent link Page information Cite this page Get shortened URL Switch to legacy parser Print/export Make a book Download as PDF Page for printing In other projects Wikidata item Appearance move to sidebar hide From Simple English Wikipedia, the free encyclopedia Modus tollendo tollens ( Latin : the way that denies by denying ) [ 1 ] is a valid , simple argument form in classical logic . It is referred to as denying the consequent . It is closely related to another valid form of argument, modus ponens or affirming the antecedent. Modus tollens is a very common rule of inference , and takes this form: If P , then Q . Not Q . Therefore, not P . [ 2 ] References [ change | change source ] ↑ .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.id-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.id-lock-limited a,.mw-parser-output .id-lock-registration.id-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.id-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}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.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}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}} Stone, Jon R. (1996). Latin for the Illiterati: exorcizing the ghosts of a dead language . London, UK: Routledge: 60. ↑ University of North Carolina, Philosophy Department, Logic Glossary Archived 2007-08-30 at the Wayback Machine . <img src="https://simple.wikipedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&amp;type=1x1&amp;usesul3=1" alt="" width="1" height="1" style="border: none; position: absolute;"> Retrieved from " https://simple.wikipedia.org/w/index.php?title=Modus_tollens&oldid=9332454 " Category : Rules of inference Hidden category: Webarchive template wayback links