Deck Alien
How do you know you're not the holographic cover of an alien spacecraft?
It would take a lot of computing power, but not is totally impossible. If all the electrical signal to the brain sensory reproduce, they could be sitting in a jar in the womb. Why you know, or believe, they are not?
You do not. You never know if there is evidence of an "outside" world ..
Invasion of the Body Snatchers – Alien Deck