1 (P ⊃ Q) ⊃ R
2 $\lor$ R)
E) ∼(∼S

Multiple Choice

1. (P ⊃ Q) ⊃ R
2. ∼(S ⊃ R)
-Which of the following propositions is an immediate (one-step) consequence in PL of the given premises?

A) P ⊃ (Q ⊃ R)
B) P • (Q ⊃ R)
C) ∼(R ⊃ S)
D) ∼(S $\lor$ R)
E) ∼(∼S $\lor$ R)