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

question 276

Multiple Choice

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

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