determine whether the argument is valid or invalid. If it is invalid, select a counterexample.
-1. A ⊃ (B $ \lor $ ∼C)
2) A ≡ (B $ \lor $ C) / ∼B ⊃ ∼A
A) Valid
B) Invalid. Counterexample when A, B, and C are true
C) Invalid. Counterexample when B and C are true and A is false
D) Invalid. Counterexample when A and C are true and B is false
E) Invalid. Counterexample when A is true and B and C are false

Question

Quizplus · Accepted Answer

The argument is valid because if A implies (B or not C) and A is equivalent to (B or C), then not B indeed implies not A, maintaining logical consistency.

Determine Whether the Argument Is Valid or Invalid ∨ \lor ∨

Determine Whether the Argument Is Valid or Invalid $\lor$