- tautology - (logic) a statement that is necessarily true; "the statement `he is brave or he is not brave' is a tautology"
--1 is a kind of truth, true statement
- tautology - useless repetition; "to say that something is `adequate enough' is a tautology"
--2 is a kind of repetitiveness, repetitiousness
- tautology - useless repetition; "to say that something is `adequate enough' is a tautology"