Given the argument: S ≡ (N ∨ H) / S ∨ ∼N // S ⊃ H This argument is: A) Invalid; fails in 4^th line. B) Invalid; fails in 2^nd line. C) Invalid; fails in 5^th line. D) Valid. E) Invalid; fails in 3^rd line.

Question

Quizplus · Accepted Answer

The argument fails in the second line, which asserts that S is equivalent to either N or H. However, the conclusion (S implies H) only follows if N is false, which is not necessarily the case if S is true but is equivalent to N. Therefore, the argument is invalid.

Given the Argument: S ≡ (N ∨ H) / S