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Determine Whether the Argument Is Valid or Invalid \lor

Question 216

Multiple Choice

determine whether the argument is valid or invalid. If it is invalid, select a counterexample.
-1. I • (J \lor H)
2) I ⊃ ∼J
3) H ≡ (K \lor I) / K


A) Valid
B) Invalid. Counterexample when H and I are true and J and K are false
C) Invalid. Counterexample when I is true and H, J, and K are false
D) Invalid. Counterexample when H, I, and J are true and K is false
E) Invalid. Counterexample when J is true, and H, I, and K are false

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