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tautology |
Also found in: Dictionary/thesaurus, Legal, Wikipedia, Hutchinson | 0.07 sec. |
tautologyIn logic, a statement that cannot be denied without inconsistency. Thus, “All bachelors are either male or not male” is held to assert, with regard to anything whatsoever that is a bachelor, that it is male or it is not male. In the propositional calculus, even complicated symbolic expressions such as [(A ⊃ B) ∧ (C ⊃ ¬ B)] ⊃ (C ⊃ ¬ A) can be shown to be tautologies by displaying in a truth table every possible combination of T (true) and F (false) of its arguments A, B, C. A tautology can be purely formal (a statement form rather than a statement), and in some usages only such formal truths are tautologies. tautology Logic a statement that is always true, esp a truth-functional expression that takes the value true for all combinations of values of its components, as in either the sun is out or the sun is not out
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More seriously, any empirical study based on such an argument will likely be tautologous, deriving the norms only from the study of normative behavior and then using these derived norms from the very same behavior. Specifically, "woman" is defined by what male desire requires for arousal and satisfaction and is socially tautologous with "female sexuality" and "the female sex. |
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