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1. Let p, q, r, and s be propositional variables. Which of the following expressions would not be formulas in conjunctive normal form? Why? (a)

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1. Let p, q, r, and s be propositional variables. Which of the following expressions would not be formulas in conjunctive normal form? Why? (a) p V p V p (b) pAqAr (c) (png) V (p r) (e) pAqp (g) s (h) -(p V q V r)

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