unanswerable

not capable of being challenged or proved wrong the unanswerable assertion that she didn't know much about art but she knew what she liked Synonyms accomplished, certain, inarguable, incontestable, incontrovertible, indisputable, indubitable, irrefragable, positive, sure, irrefutable, unarguable, unchallengeable, undeniable, unquestionableRelated Words unambiguous, unequivocal; absolute, clear, conclusive, decisive, definite, hands-down; uncontested, uncontradicted, undisputed, unquestionedNear Antonyms controversial, debated, disputed; doubtful, dubious, iffy, inconclusive, indecisive, uncertain; ambiguous, equivocal; academic (also academical), hypothetical, speculative, theoretical (also theoretic)Antonyms answerable, arguable, contradictable, controvertible, debatable, disputable, doubtable, moot, negotiable, problematic (also problematical), questionable, refutable