+**Not** is a fundamental logical operator expressing negation. It inverts a [truth value](/wiki/truth_value), changing 'true' to 'false' and 'false' to 'true'. This concept is central to [Boolean logic](/wiki/boolean_logic) and everyday understanding of absence or denial.
+## See also
+- [Negation](/wiki/negation)
+- [Truth](/wiki/truth)
+- [Falsehood](/wiki/falsehood)
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