People in the office who are so afraid of not knowing something that their first instinct is to say "Yeah, I know" when you're trying to explain something to them. No, you don't know, that's why I have to explain it to you. Pride gets in the way with a lot of people's development, so much so that they don't even realize it. It's okay to ask questions, and to find the right answer. Going about your job assuming that you know what you're doing is just asking for trouble.