Say, if a child were to grow up with a vr headset attached to him, with the vr constantly feeding him a livestream of the real world,but computer generated, and one day he were to get it yanked off his face,how would he view the real world?
Would he instantly know that he's looking at the real world?
Or would he think that it's fake,just like how you and I know that cgi,no matter how realistic,is fake?