Question: notx ( P ( x ) Q ( x ) ) - = EEx ( P ( x ) ? ? notQ ( x )

notx(P(x)Q(x))-=EEx(P(x)??notQ(x))
AAx(P(x)??R(x)) Use rules of inference to show that if AAx(P(x)(Q(x)??S(x))) and AAx(P(x)??R(x)) are true, then AAx(R(x)??S(x)) is true.
notx(P(x)Q(x))-=EEx(P(x)??notQ(x)) AAx(P(x)??R(x)) Use rules of inference to show that if AAx(P(x)(Q(x)??S(x)))

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