modus tollendo tollens
English
Etymology
Borrowed from Latin modus tollendō tollēns (roughly, “mode where infirming infirms”).
Noun
modus tollendo tollens (uncountable)
- (philosophy, logic) A valid form of argument in which the antecedent of a conditional proposition is infirmed, thereby entailing the infirmation of the consequent. Modus tollendo tollens has the form:
- 1. If non-P, then non-Q.
- 2. non-P.
- 3. Therefore, non-Q.
Hypernyms
- inference rule
- See also Thesaurus:argument form
Related terms
- modus ponendo ponens
- modus ponendo tollens
- modus tollendo ponens
Translations
Translations