Point is, if we took a man, stripped him of everything he's ever had, take away his job, his family, his car, his house, all his money, his hi-fi surround sound system, HDTV set, etc, etc; and placed him in a rubber room with no windows and a locked door, would he still believe in his own existence? Before when he had everything, and you asked him, he would say of course he exists, but afterwards, everything is a nightmare, from which he desperately wants to awake from. His perception of his own existence has been radically altered. So, he has to ask himself, what defines his existence? His possesions? Khakis do not a man make, I think.
