It seems to me that for any nerd subject, when talking to someone, within 3 sentences you figure out whether somebody is in or out. No need to look at clothes.

It seems to me that for any nerd subject, when talking to someone, within 3 sentences you figure out whether somebody is in or out. No need to look at clothes. At the same time, somebody who knows a lot about a nerd subject is generally respected, whether dressed the part or not.