1. (a.) Capable of being tested or proved.

2. (a.) Capable of being devised, or given by will.

absolute actual admitting no question confirmable demonstrable demonstratable factual historical inappealable incontestable incontrovertible indisputable indubitable irrefragable irrefutable provable real self-evident unanswerable unconfutable undeniable unimpeachable unquestionable unrefutable verifiable