JL "And how are we certain that what we dream is actually a dream, and not reality? And vice versa." I've done a lot of thinking about it. Decades even* :P and... well... there's not, yet ... there also is. * There's no nowhere. Even nowhere is a somewhere. Reality or dreaming, has to take place in a someplace. * So... even if we believe Leonard Suskind, the theoretical physicist (ie: science fiction with math behind it) who says that we may be a two dimensional hologram stretched at the event horizon of a black hole and that our 3D universe and Time is just an illusion of a replayed hologram... * ...or if we are the dream of the Universe... * ...or if we really _are_ in our bodies+brains on this planet but in a dream state instead of an awake state... * ...it's still real in some fashion.... even if it's a dream... * * That's the best I can think of at the moment :P