theoretic
theoretical
abstract
academic
arguable
armchair
at issue
confutable
contestable
controversial
controvertible
debatable
deniable
disputable
doubtable
doubtful
dubious
dubitable
fancied
hypothetic
hypothetical
ideal
iffy
imagined
impractical
in dispute
in doubt
in dubio
in question
mistakable
moot
notional
open to doubt
open to question
postulatory
problematic
putative
questionable
refutable
reputed
speculative
suppositional
supposititious
suppositive
suppository
suspect
suspicious
allegorical
attributable
autobiographical
baseless
biographical
chimerical
circumstantial
coincidental
erroneous
fanciful
farfetched
fictitious
fortuitous
illusory
inconclusive
nonexistent
problematical
rationalistic
re-written
textual
uncalled-for
unprovable
unwarranted
unquestionable