saying the same thing twice over in different words
Some people think this is an example of tautology:

It would be easy to find a blind man in a nudist colony because it wouldn't be hard.
by yorrick hunt January 22, 2008
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True by definition, literally "saying the same". Pointlessly obvious. Additional words that add no meaning.
"Either we'll get in trouble, or we won't" is a logical tautology. By including all possibilities the statement must inherently be true.

In "PIN number" the word "number" is a tautology because a PIN is always a number. (At least that's what the N originally stood for — if the term PIN evolved to include letters someday then PIN number would no longer be a tautology.)

In "morning sunrise" the tautology is "morning" because sunrises are a subset of mornings; removing the first word removes no meaning. (The addition of "morning" may be aesthetically more pleasing, in a poem for example, but it remains a logical tautology.)
by Bob Stein September 10, 2008
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Tautology (n): that which is tautologous, a tautology.
Jack built a brick house out of bricks.
The filing cabinet had inertia, it wouldn't budge.
Go sit in the corner where the walls and floor meet, boy!
The tautologous tautology
by jengajam24 March 10, 2010
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A synchrony in which formalism and representation are continuous ie. "is-is-is" collapses to 'is' or the "ohm."

A continuity of being and having.

A frame in which self-cyclicality achieves linearity (continuity) and value IS meta-value and meta-value is value rendering the semantics of "state" untenable.
In a tautology "is" is 'is' (and 'is' is "is").
by sandrashine August 7, 2018
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A tautology is a thing which is tautological.
A tautological tautology.
by unixclan.net August 10, 2006
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A logical statement in which the conclusion is equivalent to the premise
Example of a tautology: Bad people take drugs; therefore, people who take drugs are bad.
The other definition appearing here, "Unnecessary repetition of a word", is a crudification and wrong - such pointless reiterative repetition is a redundancy, and one who makes such a definition is called a "redundunce". Consult Fowler.
by Slick Willy March 16, 2005
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