nof ifs ands or buts

indisputable ironclad unassailable undeniable

accurate apodictic can bet on it certain double-checked evident final inarguable incontestable incontrovertible indubitable invincible irrebuttable irrefragable irresistible obvious odds-on positive proven set sure unanswerable unimpeachable unquestionable

disputable indefinite

doubtful dubious questionable refutable uncertain