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7. Explain why xP(x)xQ(x) is logically equivalent to xy(P(x)Q(y)). (A written English explanation may be easier than using logical equivalences.) (5 points)

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7. Explain why xP(x)xQ(x) is logically equivalent to xy(P(x)Q(y)). (A written English explanation may be easier than using logical equivalences.) (5 points)

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