Modus ponendo tollens

Noun

Definitions

1.NounA valid form of argument in which the antecedent of a conditional proposition is affirmed, thereby entailing the infirmation of the consequent. Modus ponendo tollens has the form:

"1. If P, then non-Q.; 2. P.; 3. Therefore, non-Q."

Synonyms

modus tollendo ponens modus ponendo ponens modus ponens modus tollendo tollens modus tollens affirming the consequent conditional proof modal material conditional postulation conditional unconditional

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