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QUESTION
*Using the transformation rules of system P, prove the following argument to be valid: (A B) ~C Premise 2. ~(A ~B) Premise...
*Using the transformation rules of system P, prove the following argument to be valid:
1. (A ⊃ B) ⊃ ~C Premise
2. ~(A ≡ ~B) Premise
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/ :. C ⊃ ~Z
*Using the transformation rules of system P, prove the following proposition to be a tautology:
