There is nothing that strengthens the ego more than being right. Being right is identification with a mental position - a perspective, an opinion, a judgement, a story. For you to be right, of course, you need someone else to be wrong, as so the ego loves to make wrong in order to be right.
Eckhart Tolle, A New Earth: Awakening to Your Life's Purpose
ego, judgement, opinion, perspective, right-and-wrong