noun, plural tautologies.
needless repetition of an idea, especially in words other than those of the immediate context, without imparting additional force or clearness, as in “widow woman.”.
an instance of such repetition.
a compound propositional form all of whose instances are true, as “A or not A.”.
an instance of such a form, as “This candidate will win or will not win.”.
noun (pl) -gies
the use of words that merely repeat elements of the meaning already conveyed, as in the sentence Will these supplies be adequate enough? in place of Will these supplies be adequate?
(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 Compare inconsistency (sense 3), contingency (sense 5)
- Tautological probability
logic A notion introduced by Florentin Smarandache whereby the probability of some event is more than one. Tautological probability is used for universally true propositions, i.e. those which do not depend on time, space, subjectivity, etc. [Florentin Smarandache, “A Unifying Field in Logics. / Neutrosophy: Neutrosophic Probability, Set, and Logic”, American Research Press, Rehoboth 1999]. […]
- Tautological set
logic A notion introduced by Florentin Smarandache: An element x(T, I, F) belongs more than sure to the set M; here T, I, F are real subsets representing the truth, indeterminacy, and falsity percentages respectively, and sup(T)>100. tautological set are used for universally true propositions where no parameter such as time, space, or subjectivity influences […]
noun 1. the use of tautology. 2. a tautology.
verb (used without object), tautologized, tautologizing. 1. to use tautology. verb 1. (intransitive) to express oneself tautologically