(a.) Not answerable; irrefutable; conclusive; decisive; as, he have an unanswerable argument.

absolute actual admitting no question chartered confirmable demonstrable demonstratable excepted excused exempt exempted factual favored historical immune inappealable incontestable incontrovertible indisputable indubitable irrefragable irrefutable irresponsible let off licensed permitted privileged provable real released self-evident spared testable unaccountable unconfutable undeniable unimpeachable unliable unquestionable unrefutable unsubject verifiable