Using rules from both Group I and Group II, construct a deduction to prove that the following is valid.1. P ? (Q & R) (Premise)2. ~S ? ~(Q v R) (Premise)/? P ? S

What will be an ideal response?


3. ~P v (Q & R) 1, IMPL
4. (~P v Q) & (~P v R) 3, DIST
5. ~P v Q 4, SIMP
6. (~P v Q) v R 5, ADD
7. ~P v (Q v R) 6, ASSOC
8. P ? (Q v R) 7, IMPL
9. (Q v R) ? S 2, CONTR
10. P ? S 8,9, CA

Philosophy & Belief

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What will be an ideal response?

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