How to deal with people who think they know everything but sometimes they are ignorant?

Such people regard ignorance as erudition. They always think that the world is as small as they think, so they know everything. And then stay there all day, shamelessly showing off the little things you know. They think they can plan and take charge of the overall situation, but in fact they can't see their ignorance at all. People like them often think that all knowledgeable people are like them, showing off what they only know. In fact, they forget that truly talented people always ask for advice modestly.

I hate such people the most. Every time I meet such a person, I make a detour and don't want to hear him show off his knowledge there. And I saw a bunch of sycophants around him because of his showing off. I will cast a contemptuous look, and I won't really look at it. Sometimes when I meet him showing off in front of me, I can't hide, so I have to listen to him. When I can't listen anymore, I'll go to the bathroom and slip away.

There used to be such a person in our class. He is the child of a math teacher in our school. His math scores are quite good in our class, but not the best. This man is also quite handsome, and his personality is not too bad. After all, he is a teacher's child, and his education since childhood is much stronger than that of us ordinary children. This kind of person is good everywhere, but a little self-righteous. He always thinks that he is good at math, so he often shows off his math scores. Sometimes a few students in the class discuss problems privately, and he will come and point.

Because he is good at math, some people in the class are more willing to comment on teaching like him, but the real great god in our class never points fingers at others at will. We math scum don't want to ask questions like him. The people next to our seats often discuss math problems in private. Sometimes he will come and teach us how to do it. We are grateful for teaching us how to do it. As a result, he will say "it's not that simple" after teaching. The good mood was immediately swept away, and we didn't ask him anything. He just came to show off and scolded us in turn.

Therefore, I especially hate such people. I think truly knowledgeable people are silent listeners, and only those who think they know everything are actually quite ignorant, screaming around like cicadas, which is particularly annoying. For such people, ignoring them is the best way.