Question: a) Explain whether and why the following is (or is not) satisfiable: (p r) (r s (q p)) (p r (r (q p))) (r p).

  1. a) Explain whether and why the following is (or is not) satisfiable: (p r) (r s (q p)) (p r (r (q p))) (r p).

  2. b) Determine whether the propositions (p q) r and (p r) (q r) are logically equivalent, and explain your reasoning.

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