"Pedantic" is one of those irregular adjectives in English that give non-native speakers so much trouble. I am precise, you are pedantic, and he masks his ignorance by carping about irrelevancies.In the first person, it does seem to me that self-educated people (including, as Jeremy points out, just about everyone in applied quantitative finance) have to be precise. In a formal educational setting, you get used to abbreviated notation. For example, at Chicago someone could say "and the usual CAPM assumptions," which came out as one sylable (roughly, "YCMS"), and everyone knew exactly what was meant because listing those assumptions was the first question on every year's PhD qualifying exam. There were dozens of other word/gesture combinations, copied from some professor's lecture, that everyone understood. Self-educated people aren't exposed to that.In the second person, I think there's no difference based on form of education. Some people like to get details right even when they don't matter, others don't. The world needs both kinds.In the third person, I think this is almost solely confined to educated people, probably because people without formal education cannot get away with it.