confutable
confutative
disavowable
questionable
refutable
arguable
at issue
conjectural
contestable
contradictable
controversial
controvertible
debatable
disputable
doubtable
doubtful
dubious
dubitable
iffy
in dispute
in doubt
in dubio
in question
mistakable
moot
open to doubt
open to question
problematic
speculative
suppositional
suspect
suspicious
traversable
access-control
disease-resistant
factor-b
mercantilist
need-to-know
no-arbitrage
non-proliferation
off-limits
optionality
rules-based
stunning...thinking
summable
supportable
travelers'
unassured
unsay
user-based