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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Everything around me is what I perceive to be real. This includes the environment around me, you and I. This also includes this comment and yours. These all theoretically exist in my theoretical self. But since this is perceived by me, I cannot. But I can assure you that if I do not exist neither do you, making this challenge invalid and irrelevant. But in my mind I do exist, as does this comment. Nothing can be truly proven to be real because we are all biased by our own mind's perceptions.