[nikkwong]

Well, what if you're just 'one of the zombies' and I'm actually the only conscious being just reading your comment? Joking, but in all truthfulness I don't think it's all that unlikely. What if the simulation you are experiencing is being put in place by yourself—that is, 'you' in the higher dimension? Or, it could also be some kind of experiment to see how 'you' given your brain, environmental inputs, etc. grow and respond to stimuli. That doesn't seem unlikely at all.