Essay
determine whether the given argument is valid or invalid. If it is valid, derive the conclusion using our rules of inference and equivalence. If it is invalid, provide a counterexample.
-1. (?x)[Lx ? (?y)(My • Nxy)]
2. (?x)[Lx • (?y)Nxy] / (?x)[Mx • (?y)Nxy]
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