truism

A statement that is obviously true or that is often presented as true: synonym: cliché.

An undoubted or self-evident truth.

Synonyms Aphorism, Axiom, Maxim, etc. See aphorism.

An undoubted or self-evident truth; a statement which is pliantly true; a proposition needing no proof or argument; — opposed to falsism.

A self-evident or obvious truth.

A banality or cliché.

an obvious truth