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1. For each of the following two predicate expressions, find an interpretation where the expression is true and another one in which it is false:

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1. For each of the following two predicate expressions, find an interpretation where the expression is true and another one in which it is false: (a) (Vx)(Vy)[P(x,y) P(y,x)]. (b) [(Vx)A(x) + (Vx)B(x)] (Vx)[A(x) + B(x)]

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