[DreamsofPolycarp]

I say the entire universe, including you and everyone else here on this thread, is a figment of my very creative imagination. You don’t really exist — I conjured you up in my mind. Can you prove that is incorrect?

That is the best post I have seen on this thread so far! I don't know if you realize it, but you have just jerked the guts out of the empiricist nonsense that gets bandied about in the natural sciences community. Hats off to ya for that. Do you realize what you have done to your own empiricism and trust in "science?"

[GunRunner]

You don’t really exist — I conjured you up in my mind. Can you prove that is incorrect?

No, but we can put you in a straight jacket while the rest of the world gets on with our lives.