modus tollens ( synonym found)
Definition of modus tollens:

(n) : an 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:
Definition of modus tollens:

(n) : an 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:
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