He is always right, or is he?

Have you met/lived with someone who is always right? My husband reads a lot, and by a lot I mean he reads all the time, sickening really; additionally he is curious and always is observing and asking questions. Well, needless to say; because of the amount of information that he possesses, he is pretty much used to the reality and sometimes perception that he is always right. It is really annoying! Because he is not infallible, I just wish he knew so he could stop