noun, plural tau·tol·o·gies.
- 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.”
Can be confusedredundancy tautology
Examples from the Web for tautological
A tautological sentence, perhaps, but one that nevertheless needs to be repeated and understood.Michael Tomasky: Why Mitt Romney’s Opportunity Tack Won’t Work|Michael Tomasky|December 27, 2011|DAILY BEAST
The tautological blame always comes back to the claim that frivolous or even fraudulent lawsuits are commonplace.
That's tautological, of course, for prejudice is always ill-informed, isn't it?Recollections of a Varied Life|George Cary Eggleston
A nominalist to the core, he held that definition and predication are either false or tautological.
The only point on which remark open to criticism is that it is tautological.
Therefore, if both budge and fur be taken literally the line is tautological.Milton's Comus|John Milton
Literally, the phrase "Think for yourself" is tautological; any thinking is thinking for one's self.How We Think|John Dewey