tautology

IPA: tˈɔtˈɑɫʌdʒi

(uncountable) Redundant use of words, a pleonasm, an unnecessary and tedious repetition.
(countable) An expression that features tautology.
(countable, logic, propositional logic) A statement that is true for all truth values of its propositional variables.
(countable, logic, first-order logic) A statement that is true for all truth values of its Boolean atoms.

Examples of "tautology" in Sentences

Digital download? isnt that what they call a tautology?
That is not a tautology, that is just being confused and contradictary
A tautology is a logical fact, one that is independent of any empirical observation.
Will someone please explain to Egnor that a tautology is a kind of statement, not a kind of concept?
Cato - Its an absolute certainty that your close scrutiny revealed a tautology, which is an added bonus.
This is the logical notion of tautology, which is very different from the way the term tautology is used in stylistics
It's only a tautology is you pretend life and niches don't have distinguishable properties and that a niche can't be populated.
And to say so is not to engage in tautology, which I think you were referring to, Andrew, when you made that remark about philosophy classes.
Homer Nods We erred yesterday in characterizing as a tautology the statement that if obese people outnumber the merely overweight, they must also outweigh them.
They argue that it is not a genuine claim about the real world but merely a truism, what philosophers call a tautology ” something true by the meaning of the words like ˜bachelors are unmarried.™