contestable
controversial
arguable
at issue
confutable
conjectural
contentious
controvertible
debatable
deniable
discussible
disputant
disputatious
doubtable
doubtful
dubious
dubitable
iffy
in dispute
in doubt
in dubio
in question
litigable
mistakable
moot
open to doubt
open to question
problematic
questionable
refutable
speculative
suppositional
suspect
suspicious
uncertain
undecided
unsettled
disputation
dispute
Spencerian
considered
defamatory
himself-a
imprecise
inaccurate
inexact
irrepealable
much-discussed
much-disputed
non-lymphoid
problematical
recondite
unadjusted
uncool
undetermined
unordered
unrealised
immutable
indisputable
inscrutable
irrefutable
mutable
suitable
unsuitable
unquestionable