incertain
questionable
uncertain
unconvinced
unsure
Humean
Pyrrhonic
a bit thick
a bit thin
absurd
agnostic
ambitendent
ambivalent
amoral
arguable
at issue
at loose ends
beguiling
beyond belief
capricious
catchy
changeable
confutable
conjectural
conscienceless
contestable
controversial
controvertible
corrupt
corrupted
criminal
crooked
dark
debatable
deceiving
deceptive
delusive
delusory
deniable
devious
dishonest
dishonorable
disinclined
disputable
distrustful
double-minded
doubtable
doubtful
doubting
dubitable
equivocal
evasive
ambiguous
contradictory
exceptional
only
peculiar
perplex
political
speculative
worldly
indubious