Irreversible truths are facts that cannot be changed, reversed or undone. They are statements that imply an unquestionable reality and are often used to express certainty, permanence, or inevitability. Some synonyms for this powerful expression include inalienable facts, immutable realities, incontrovertible certainties, indelible verities, and indubitable axioms. Each of these phrases conveys a sense of unyielding truth and makes a powerful statement in any context they are used. Irreversible truths are often used to make sure that a point is conveyed with complete conviction or to explain the gravity of a situation that cannot be changed.