[Revised entry by Laurence R. Horn and Heinrich Wansing on March 11, 2025.
Changes to: Main text, Bibliography, notes.html, substructural.html, unary-connective.html]
Negation is in the first place a phenomenon of semantic opposition. As such, negation relates an expression (e) to another expression with a meaning that is in some way opposed to the meaning of (e). This relation may be realized syntactically and pragmatically in various ways. Moreover, there are different kinds of semantic opposition. Section 1 is concerned mainly with negation and opposition in natural language, both from a historical and a systematic perspective….

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