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Hyperintensionality

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[New Entry by Francesco Berto and Daniel Nolan on February 8, 2021.] A hyperintensional concept draws a distinction between necessarily equivalent contents. If the concept is expressed by an operator, (H), then (H) is hyperintensional insofar as (HA) and (HB) can differ in truth value in spite of (A) and (B)'s being necessarily equivalent. Necessary equivalence of claims is standardly understood in terms of possible worlds (ways things could have been): (A) and (B) are necessarily equivalent when they are true at the same worlds. This is sometimes put in terms of sentences...

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News source: Stanford Encyclopedia of Philosophy

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