tautology

noun

statement which repeats the same idea, using near-synonymous morphemes, words, or phrases

Wiktionary

Pronunciation: /tɔˈtɒləd͡ʒi/ / /toːˈtɔləd͡ʒi/ / /tɔˈtɑləd͡ʒi/

noun

Etymology: From Late Latin tautologia, from Ancient Greek ταὐτολογία (tautología) from ταὐτός (tautós, “the same”) + λόγος (lógos, “explanation”). By surface analysis, tauto- + -logy.

Redundant use of words, a pleonasm, an unnecessary and tedious repetition.
“It is tautology to say, "Forward Planning".”
An expression that features tautology.
“The expression "raze to the ground" is a tautology, since the word "raze" includes the notion "to the ground".”
“Pure mathematics consists of tautologies, analogous to ‘men are men’, but usually more complicated.”
A statement that is true for all truth values of its propositional variables.
A statement that is true for all truth values of its Boolean atoms.