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 thing we use as concrete fact is [i]seeing[/i] a thing to make it real. So, what if you couldn't see something but it was real? Or the other way around? We could all be a hallucination to 1 person!