Given the argument: Q ⊃ A / ∼ (A • Q) / A ≡ Q This argument is: A) Invalid; fails in 1^st line. B) Valid. C) Invalid; fails in 3^rd line. D) Invalid; fails in 2^nd line. E) Invalid; fails in 4^th line.

Question

Quizplus · Accepted Answer

The argument is invalid because the equivalence A ≡ Q does not hold when A is true and Q is false, which contradicts the given premises.

Given the Argument: Q ⊃ a / ∼ (A •