Modus Tollensとは 意味・読み方・使い方

語源

From Latin modus tollendō tollēns (“the mode where the denying denies”), from modus (“mode”) and forms of tollō (“to take away”).

名詞

modus tollens (uncountable)

1. (philosophy, logic) A valid form of argument in which the consequent of a conditional proposition is denied, thus implying the denial of the antecedent. Modus tollens has this form:

   1. If P, then Q.

   2. Not Q.

   3. Therefore, not P.

上位語

• inference rule
• See also Thesaurus:argument form

関連する語

• modus ponens