You know you are a dork, but you find it weird that you are not after high grades, and you are not exactly that math bookworm either. And then you start thinking that you're probably a maverick dork, and keeps on wondering why your Ti works better than everyone else's.
Once you notice, that you use a system of authority, that is completely different from the general socially expected one and is completely incompatile to it.
You question and are prepared to drop all traditions on whimsical reasons.
Nothing is sacred for you. All bonds can be severed easily, nothing is beyond scrutiny.
You think about stuff, but you don't really care about anything unless it's a point of major interest.
The stuff you don't use, if left somewhere in the room that doesn't put it dead smack in your face 24/7, becomes completely invisible to your perception of the room and it only reappears once you try to either analyze the whole structure of a room (which doesn't happen more, than 3 times in a year) or happen to have a need to reuse the item once again.
You didn't notice that Spock was supposed to be a parody character until someone mentioned that to you.
You have a way of speech that seems somewhat phlegmatic and your general look
You can emulate almost all variations of social behavior nearly flawlessly, but none of which come to you naturally. Be it body language, charisma, flirting, sense of etiquette or another, keeping them "on" for sustained periods of time requires a great deal of energy after which you just want to just freeze while being alone in a room.
You feel weird when reading a post that has several emoticons in it.
You want to brutally murder someone, if they are telling you information that is "self-explainable" in high detail and are repeating themselves while doing it.