Questionable /(?)/

Ques·tion·a·ble

Questionable

a.
  1. Admitting of being questioned; inviting, or seeming to invite, inquiry. [R.]
    Thou com'st in such a questionable shape That I will speak to thee.
  2. Liable to question; subject to be doubted or called in question; problematical; doubtful; suspicious.
    It is questionable whether Galen ever saw the dissection of a human body.T.
    — Baker.