I Dont Understand Yet

I just came across this and this sounds a lot like me. I was wondering is someone could help explain it to me more and explain how people know they are this.. it is a test? diagnosis? is it just a type of personality or is it more of a disorder .. I am just slightly confused. I would love any advice and help because I really feel like this could help explain a lot of stuff :)))
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May 16, 2012