tautology
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English[edit]
Etymology[edit]
From Late Latin tautologia, from Ancient Greek ταυτολογία (tautología) from ταὐτός (tautós, “the same”) + λόγος (lógos, “explanation”)
Pronunciation[edit]
Noun[edit]
tautology (countable and uncountable, plural tautologies)
- (uncountable) Redundant use of words, a pleonasm, an unnecessary and tedious repetition.
- It is tautology to say, "Forward Planning".
- (countable) An expression that features tautology.
- The expression "raze to the ground" is a tautology, since the word "raze" includes the notion "to the ground".
- 1946, Bertrand Russell, History of Western Philosophy:
- Pure mathematics consists of tautologies, analogous to ‘men are men’, but usually more complicated.
- (countable, logic) In propositional logic: a statement that is true for all truth values of its propositional variables. In first-order logic: a statement that is true for all truth values of its Boolean atoms.
Antonyms[edit]
- (linguistics: expression): contradiction in terms
- (in logic): contradiction
- (literary): oxymoron
Coordinate terms[edit]
- (in logic): contingency, contradiction
Derived terms[edit]
terms derived from tautology (noun)
Translations[edit]
uncountable: redundant use of words
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expression that features tautology
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in logic
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See also[edit]
- pleonasm
- redundancy
Tautology on Wikipedia.Wikipedia
