Question: The single most important idea in formal logic is that the meaning of a sentence can be represented as a set-theoretic set of possible worlds.

The single most important idea in formal logic is that the meaning of a sentence can be represented as a set-theoretic set of possible worlds. Given a universe with propositional symbols P,Q, R and S, how many interpretations are there ii the meaning of the following KB ? (PQ)(PQ)(PQ)(RS)(RS)(PQ)

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