Question: True or false? Say why. A) If a statement is unsatisfiable (i.e., true upon no valuation), its denial is valid in itself. B) If each

True or false? Say why.

A) If a statement is unsatisfiable (i.e., true upon no valuation), its denial is valid in itself.

B) If each statement in a set is satisfiable (i.e., true upon at least one valuation), so is the set.

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