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Answer by Bumble for Why shouldn’t I be a skeptic about the Necessitation...
Modal logics that include the necessitation rule are called normal. Not all modal systems are normal. Some of the non-normal logics are S1, S2 and S3, which are consistent with the necessitation rule,...
View ArticleWhy shouldn’t I be a skeptic about the Necessitation Rule for alethic modal...
Alethic modal logics for metaphysical possibility and necessity usually have the Necessitation Rule:From ⊢P, infer ⊢□P.Doesn’t this commit us to the meta-notion that logical necessity modulo some proof...
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