Text: Complete the following derivation using the basic rules and the following selection of derived rules: DNE, DNI, Comm&, Comm∨, DeM, DSL, DSR, MT, Trans, HS, Def→E, and Def→I.
1. ( (P & ¬Q) → S ) Premise
2. ( (¬P & Q) → S ) Premise
3. ( ¬(P & Q) & (P ∨ Q) ) Premise
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n. S Goal