Multiple Choice
(A ⊃ B) ⊃ (∼B ⊃ ∼A)
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) (A ⊃ B) ⊃ (∼B ⊃ ∼A)
B) (A ⊃ B) ⊃ ∼B
C) A ⊃ B
D) A
Correct Answer:

Verified
Correct Answer:
Verified
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