If what you say makes the people you are talking to feel stupid, and you don't care that it does, then you will be perceived as arrogant. There are other ways of being arrogant, I am sure. This is one way.
If people who are more powerful than you perceive you to be arrogant, they will tend to lash out and strike back. If people who are less powerful than you perceive you as arrogant, they will walk on eggshells around you. Because no one likes to feel stupid.
The tricky thing is that you need to remember to care about how what you say will make people feel, even when what you are saying is purely technical in nature. In other words, you can't ever focus so purely on the technical issues that you forget to craft your words to account for your audience's feelings. Which is really hard.
If people who are more powerful than you perceive you to be arrogant, they will tend to lash out and strike back. If people who are less powerful than you perceive you as arrogant, they will walk on eggshells around you. Because no one likes to feel stupid.
The tricky thing is that you need to remember to care about how what you say will make people feel, even when what you are saying is purely technical in nature. In other words, you can't ever focus so purely on the technical issues that you forget to craft your words to account for your audience's feelings. Which is really hard.