1. (Z ⊃ W) • (X ⊃ Y)
2. X $ \lor $ Z
3. ∼Y / W
-Which of the following propositions is a likely last line of the indented sequence for an indirect proof of the given argument?
A) Q • ∼W
B) X • ∼X
C) Y • ∼Y
D) Z • ∼Z
E) All of the above

Question

Quizplus · Accepted Answer

The Answer of 1. (Z ⊃ W) • (X ⊃ Y)
2. X $ \lor $ Z
3. ∼Y / W
-Which of the following propositions is a likely last line of the indented sequence for an indirect proof of the given argument?
A) Q • ∼W
B) X • ∼X
C) Y • ∼Y
D) Z • ∼Z
E) All of the above

1 (Z ⊃ W) • (X ⊃ Y) 2 ∨ \lor ∨

1 (Z ⊃ W) • (X ⊃ Y)
2 $\lor$