1 ∼R ≡ S
2 $\lor$ T) ⊃ U
-Which of the Following Propositions Is Derivable

1. ∼R ≡ S
2. T ⊃ R
3. ∼(R $\lor$ T) ⊃ U
-Which of the following propositions is derivable from the given premises using any of the twenty-five rules of PL and either the direct or conditional methods of proof?

A) S ⊃ R
B) S ⊃ T
C) S ⊃ (R • T)
D) S ⊃ U
E) S ⊃ (R • U)

Correct Answer:

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