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
testability
achievable
definable
determinable
dissoluble
extractable
nebular
negotiable
observable
quantifiable
realizable
salable
still-recent
targetable
time-related
treatable
unverifiable
untestable