Negation refers to the situation in which something is said not to be the case. In propositional logic, it is the logical operation which turns the truth value of a proposition into its opposite. Proposition Neg phi is true if and only if phi is not true:
(i) phi Neg phi 1 0 0 1
Relational adjective: negative
- Direct negation
- Double negation
- External negation
- Indirect negation
- Internal negation
- Sentential negation
- Gamut, L.T.F. 1991. Logic, language, and meaning, Univ. of Chicago Press, Chicago.
- Givón, Talmy. 1978. Negation in language: Pragmatics, function, ontology. In: Peter Cole (ed.) Syntax and Semantics, Volume 9 (Pragmatics). New York: Academic Press, 69-112.
- Horn, Lawrence R. 1989. A natural history of negation. Chicago: University of Chicago Press.