Home›Browse›proof by contrapositive🌐EnglishEnglishEspañolItalianoPortuguêsالعربيةفارسی中文日本語EntityQ20014476· pop 9proof by contrapositiveSign in to saveAlso known as proof by negationlogical argumentWikidata factsSubclass ofmathematical proofShow 1 more facthas causecontrapositionvia Wikidata · CC0Available in 8 languagesEspañol中文日本語PortuguêsItalianozh_yueفارسیvia Wikidata sitelinks · CC0