This is easily differentiated from good questions. Good questions come from the truly teachable. One needs to let go of the ego to be a good question asker. Such humility makes one a favorite student to any competent teacher. Humility is always endearing.
Pride is definitely the cause of the un-teachable attitude.
The best teacher will also have a humble teachable attitude. Anyone who has taught Wing Chun for a while will have to admit that they have learned just as much teaching it as they taught. Many times students will ask a question you have never thought of, or will express an insight you had never considered. This is one of the great benefits of being a student who is learning in a class with other students. It is also one of the benefits of teaching the art.