[(P $\lor$ Q) ⊃ R] ⊃ [S ⊃ (Q ⊃ R)]
Which

question 303

Multiple Choice

[(P $\lor$ Q) ⊃ R] ⊃ [S ⊃ (Q ⊃ R) ]
Which of the following propositions is a proper assumption for conditional proof to prove that the above wff is a logical truth of PL?

• A) [(P \( \lor \) Q) ⊃ R] ⊃ [S ⊃ (Q ⊃ R)]
• B) [(P \( \lor \) Q) ⊃ R] ⊃ (S ⊃ Q)
• C) [(P \( \lor \) Q) ⊃ R] ⊃ S
• D) (P \( \lor \) Q) ⊃ R
• E) (P \( \lor \) Q

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