Using rules from both Group I and Group II, construct a deduction to prove that the following is valid.1. (P ? Q) & (R ? S) (Premise)2. Q ? ~S (Premise)3. ~T ? (P & R) (Premise)/? T

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4. P ? Q 1, SIM
5. R ? S 1, SIM
6. ~Q v ~S 2, IMPL
7. ~P v ~R 4,5,6, DD
8. ~(P & R) 7, DEM
9. T 3,8, MT

Philosophy & Belief

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What will be an ideal response?

Philosophy & Belief

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Philosophy & Belief