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3. Consider the following set of formulas in FOL: : (x) (P(x) (Q(x) R(x))) : (x) (P(x) U(x))) Show that = (x) (U(x) R(x)) is
3. Consider the following set of formulas in FOL:
: (x) (P(x) (Q(x) R(x)))
: (x) (P(x) U(x)))
Show that = (x) (U(x) R(x)) is a logical consequence of and .
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