When you think you have learnt something and your ego wants to gloat, learn some more.
May be there is something in there, that you missed seeing.
May be there is some angle that is as yet unexplored.
Be irreverent in your dissections.
It is not easy, because your ego will step in, assuring you that you know all you need to, to survive and excel.
Challenge it. Find out one more new thing.
Turn the argument around. See where it goes.
All of life is only learning, unlearning and re-learning.