modus tollendo tollens
English
editEtymology
editBorrowed from Latin modus tollendō tollēns (roughly, “mode where infirming infirms”).
Noun
editmodus 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
edit- inference rule
- See also Thesaurus:argument form
Related terms
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