Question: Using only the 12 basic intro/elim rules of Natural Deduction (you may not use logical equivalences), prove the following: Vxy[P(x,y) ^ Q(y)] xyz(x, y)

Using only the 12 basic intro/elim rules of Natural Deduction (you may

Using only the 12 basic intro/elim rules of Natural Deduction (you may not use logical equivalences), prove the following: Vxy[P(x,y) ^ Q(y)] xyz(x, y) Q(y) ^ Q(z)] Note: We assume that all variables are in the same domain.

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