Essay
Construct a derivation to prove that each of the following propositions is a logical truth of PL using any of the twenty-five rules and conditional proof.
-(A ⊃ B) ⊃ {(C ⊃ D) ⊃ [(∼A ⊃ C) ⊃ (∼D ⊃ B)]}
Correct Answer:
Verified
Correct Answer:
Verified
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