a : needless repetition of an idea, statement, or word
b : an instance of tautology
Examples of TAUTOLOGY
- “A beginner who has just started” is a tautology.
Origin of TAUTOLOGY
Late Latin tautologia,
from Greek, from tautologos
First Known Use: 1574
Rhymes with TAUTOLOGY
tautology noun (Concise Encyclopedia)
In logic, a statement that cannot be denied without inconsistency. Thus, All bachelors are either male or not male is held to assert, with regard to anything whatsoever that is a bachelor, that it is male or it is not male. In the propositional calculus, even complicated symbolic expressions such as [(A B) (C ¬ B)] (C ¬ A) can be shown to be tautologies by displaying in a truth table every possible combination of T (true) and F (false) of its arguments A, B, C. A tautology can be purely formal (a statement form rather than a statement), and in some usages only such formal truths are tautologies.
Learn More About TAUTOLOGY
Seen & Heard
What made you want to look up tautology? Please tell us where you read or heard it (including the quote, if possible).