Bet you can't. You can't prove that you're really you.
EDIT:
Stop using the argument "I think, therefore I am." argument. It does not present facts.
EDIT 2:
1000 posts and still no proof. C'mon Flood!
EDIT 3:
Stop asking me to prove [i]my[/i] existence. That's not the point of this thread.
EDIT 4:
I know that there are actual theories and beliefs that we are all(or, more correctly, one or a handful of us) just an intelligence and everything else is a projection in a dream state. This argument that I have used in no way represents my views or beliefs.
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The only way to prove that I am myself is that I can perceive what my mind thinks is reality by pain. I don't think therefore I am because words come before thoughts than thoughts coming before words. I am able to make sense of my own perception by simply inducing pain on myself with a knife, and I can make a base observation that I am in pain, therefore I am. Truly, this post could be a false-reality. I could be in a dream where I can't control anything and everything that is generated is random because of my past experience - assuming my past experience consisted of what in perceiving now. This forum post could be a randomly generated idea that my mind created. The motivation of this does not show that I exist but rather that you don't exist... Or anyone and anything for that matter. I could simply be the universe, a god playing who he is not. Do I have the power to control others? Therefore am I perceiving other's reality? No. The only conclusion that could be made is that everything is myself because you are me, I am created and I create my own universe. After I die in this false-reality universe I can spawn as a girl next time, or an alien in another planet, or a universe where physics is not able to be proven. Everything is me.