from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Needless repetition of the same sense in different words; redundancy.
- noun An instance of such repetition.
- noun Logic An empty or vacuous statement composed of simpler statements in a fashion that makes it logically true whether the simpler statements are factually true or false; for example, the statement Either it will rain tomorrow or it will not rain tomorrow.
from The Century Dictionary.
- noun Repetition of the same word, or use of several words conveying the same idea, in the same immediate context. See
- noun The repetition of the same thing in different words; the useless repetition of the same idea or meaning: as, “they did it successively one after the other”; “both simultaneously made their appearance at one and the same time.”
- noun Synonyms Redundancy, etc. See
from the GNU version of the Collaborative International Dictionary of English.
- noun (Rhet.) A repetition of the same meaning in different words; needless repetition of an idea in different words or phrases; a representation of anything as the cause, condition, or consequence of itself, as in the following lines: -- The dawn is overcast, the morning lowers, And heavily in clouds brings on the day. Addison.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun uncountable
redundantuse of words
- noun countable An expression that features tautology.
- noun countable, logic A
statementthat is true for all valuesof its variables
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun (logic) a statement that is necessarily true
- noun useless repetition
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
This is the logical notion of tautology, which is very different from the way the term tautology is used in stylistics
On also, too DC 2009
Digital download? isnt that what they call a tautology?
Voodoo Extreme 2009
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.
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.™
Creationism Ruse, Michael 2007
Cato - Its an absolute certainty that your close scrutiny revealed a tautology, which is an added bonus.
Cross & Rude « POLICE INSPECTOR BLOG Inspector Gadget 2009
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.
Will someone please explain to Egnor that a tautology is a kind of statement, not a kind of concept?
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.