most people live in an alternate reality that was created for them by the people that control them. It begins with the education system and it continues to be enforced by the media, the workplace and most of society for the rest of their lies. This is not the type of matrix that Musk was referring to but the one that I am talking about is real, while his isn't.
How do you know it isn't? I believe part of the theory itself is there is no way to prove it real or not.