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Modus tollens ukr sposib sho zaperechuye ce formalna nazva dlya dovedennya vid suprotivnogo Vzhivayetsya takozh skorochennya MT Modus tollens ye prostoyu chasto vzhivanoyu formoyu argumentaciyi Yaksho P to Q Q ye hiboyu Tomu P ye hiboyu Vikoristovuyuchi logiko operatornu notaciyu p q displaystyle p rightarrow q q displaystyle neg q p displaystyle vdash neg p de displaystyle vdash ye logichnim tverdzhennyam Abo u teoretiko mnozhinnij formi P Q displaystyle P subseteq Q x Q displaystyle x not in Q x P displaystyle therefore x not in P P displaystyle P ye pidmnozhinoyu Q displaystyle Q x displaystyle x ne nalezhit Q displaystyle Q Otzhe x displaystyle x ne nalezhit P displaystyle P Argument maye dva posilannya Pershe posilannya ce umovne tverdzhennya yaksho to a same sho iz P viplivaye Q Drugim posilannyam ye te sho Q ye hiboyu Z cih dvoh posilan viplivaye sho P ye hiboyu Yaksho P istinne to Q takozh istinne z pershogo posilannya ale ce superechit drugomu posilannyu Vazhlivo zauvazhiti sho v pravdivomu sudzhenni yaksho posilannya istinni to visnovok obov yazkovo viplivaye Div takozh RedaguvatiZaperechennya Spisok latinskih visloviv Modus operandi Modus ponens Modus vivendiDzherela RedaguvatiUmovivodi logiki vislovlyuvan v tradicijnij logici Arhivovano 5 bereznya 2016 u Wayback Machine nbsp Ce nezavershena stattya z logiki Vi mozhete dopomogti proyektu vipravivshi abo dopisavshi yiyi Otrimano z https uk wikipedia org w index php title Modus tollens amp oldid 35671176