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4. Show that Pn(P Q) Q are logically equivalent using truth tables, and also by using the laws of propositional logic. 5. Show that -P

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4. Show that Pn(P Q) Q are logically equivalent using truth tables, and also by using the laws of propositional logic. 5. Show that -P V(-PQ) A P is a tautology. 6. Show that (PAQ) AN(PAQ) is a contradiction

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