Feel, touch, smell, hear, and taste. The five senses we all have built into us. Now of course those are also the things we use to see if we ever think we're dreaming, or just not real in general. Of course when all those senses are working, then most people will just shove it off as a daydream, or what have you. But there's a secret no one knows about. A secret of pure genius that would be called complete insanity if anyone on this earth knew. Maybe we're all in some dream, or secret reality that is all some experiment. Only one will find out the truth behind it all.