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[(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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