The chapter, Bouncing a reality check, in Melville's book ELF is still bugging me . he uses a digital camera as an analogy to show how we don't really see anything real. our visual cortex is like the screen on a camera, the sun doesn't illuminate the scene on the screen. and the picture we see isn't the thing were photographing. same with our visual cortex. we only see the contents of our mind. but what gets me is when he proves we don't see anything outside our head he askes the reader to look up at the sky and think about where the outside of your head is. I can't look up without thinking that and thinking there is no objective reality, there's just this....dream state. I know I'm not explaining this as good as he does , but you get what I'm saying. I think I've stopped believing in a objective reality. It's more than a little unsettling.