Physical Theories and Possible Worlds
Formalized physical theories are not, as a rule, stated in intensional languages. Yet in talking about them we often treat them as if they were. We say for instance: ‘Consider what would happen if instead of p’s being true q were. In such a case r would be likely.’ If we say this sort of thing p, q and r appear to stand for the meanings of sentences of the theory, but meanings in some intensional sense.
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