Modal Logic

[Revised entry by James Garson on May 27, 2014. Changes to: Main text, Bibliography] A modal is an expression (like 'necessarily' or 'possibly') that is used to qualify the truth of a judgement.
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[Revised entry by James Garson on May 27, 2014. Changes to: Main text, Bibliography] A modal is an expression (like 'necessarily' or 'possibly') that is used to qualify the truth of a judgement. Modal logic is, strictly speaking, the study of the deductive behavior of the expressions 'it is necessary that' and 'it is possible that'. However, the term 'modal logic' may be used more broadly for a family of...

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News source: Stanford Encyclopedia of Philosophy

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