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# Symbolic Logic Problem : Proof

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Construct a formal proof which shows that the sentence below is a theorem of predicate logic. *the E's are existential quantifiers (usually designated by backwards E's). the & are "and". Do not use quantifier negation rules.

[(x)(~Rx or Nx)& ~(Ex)Nx or (Ey)(z)Szy] ->(~(Ex)Rx or (z)(Ey)Szy

##### Solution Summary

A formal proof is provided to how that a sentence is a theorem of predicate logic. Existential quantifiers and negation rules are analyzed.

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Construct a formal proof which shows that the sentence below is a theorem of predicate logic. *the E's are existential quantifiers ...

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