I think this is the basis for some famous philosophy, but I'm not sure. I thought of this on one of my sleepless nights, which are pretty often. Anyway... Does anything really exist? Or is it all just electric impulses from our nerves that our brain deciphers into sound, taste, hearing, sight, and smell? Can everything be described as these impulses? And while I am here, is it possible to make a machine that can stimulate areas in our brain that receive the senses, and therefore create a virtual world that is indistinguishable from reality? I hate to quote the Matrix, but it pretty much sums up everything I've been trying to say. "If this is "real", then "real" is merely electrical signals interpreted by your brain." I don't want to start a flame war, I am just curious as to what others think.