lets make things simple:
lets assume, a single thought can generate 2 opposite possibilities.
while on everage, human brain comes up with 79,999 different thoughts.
multiply that, to the probability of having IQ slightly above average.
give it in to the power of loneliness, as a product of living alone..
hence, more chance to be indulge in conversations with your own self.

BAM!
u've got a weirdo!

give and take to humane limitations:
that person may possibly hv selective hearing, difficulties in daily tasks such as read and write, problematic in obiding a certain system/law, and basically; people u want to outkast.

welcome, to my world :D

I HATE FASHION!!!

marry me and il bear you child

(anyone?)

...

WORLD PEACE!