Which rule of inference makes the conclusion of this argument follow from its premise?
A ? B
? (~A ? ~B)
A)addition
B)exportation
C)commutation
D)transposition

Question

Which rule of inference makes the conclusion of this argument follow from its premise?
A ? B
 ? (~A ? ~B)
A)addition
B)exportation
C)commutation
D)transposition

Quizplus · Accepted Answer

Transposition is the rule of inference that allows one to infer the conclusion (~A → ~B) from the premise (A → B). It involves flipping the antecedent with the consequent and negating both.

Which Rule of Inference Makes the Conclusion of This Argument