Fake realities will create fake humans. Or, fake humans will generate fake realities and then sell them to other humans, turning them, eventually, into forgeries of themselves. So we wind up with fake humans inventing fake realities and then peddling them to other fake humans. It is just a very large version of Disneyland. You can have the Pirate Ride or the Lincoln Simulacrum or Mr. Toad’s Wild Ride—you can have all of them, but none is true.
-Philp K. Dick, How to Build a Universe That Doesn’t Fall Apart Two Days Later