Question: 9.5 Let A(xi..... xn) be a formula with no quantifiers and no function symbols. Prove that yxi . . . ,,A(xi, . . . ,

9.5 Let A(xi..... xn) be a formula with no quantifiers and

9.5 Let A(xi..... xn) be a formula with no quantifiers and no function symbols. Prove that yxi . . . ,,A(xi, . . . , xn) s satisfiable if and only if it is satisfiable in an interpretation whose domain has only one element

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