Often when you try to teach and explain something to someone you also clarify your own mind and even the questions they ask will possibly start you thinking.
Always thought there is no such thing as a dumb question. Better to ask a dumb question than make a dumb mistake.
I've even told someone they were not dumb for not understanding something, rather the teacher has not been able to explain something in a way someone might better understand.
We have all at some time used analogies or drawn pictures and some people prefer examples or written word over spoken.
And there's always a time to ask, what am I missing here?
So bouncing ideas works hence forums and discussion group.