tautology

/toːˈtɔl.ə.d͡ʒi/noun
High School
1

Redundant use of words, a pleonasm, an unnecessary and tedious repetition.

2

An expression that features tautology.

3

A statement that is true for all truth values of its propositional variables.

4

A statement that is true for all truth values of its Boolean atoms.

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