A teachable person is an intelligent listener. It's very easy to spot an un-teachable person. First, their principle interest is to support their own position. A rebellious spirit causes us to be selective listeners. An unteachable person will seldom view life through another person's glasses.
Undisciplined living is a fourth indicator of a rebellious spirit.
He will not obey us. He is a profligate and a drunkard. Profligate means to be loose morally which is undisciplined activity. Drunkenness is another expression of lack of discipline. Undisciplined living can be expressed in ways other than drunkenness and immorality.