What if everything you know is fake? That is a premise that was repeatedly explored by author Philip K. Dick in his science fiction novels. Some of his stories have been made into popular films such as “Total Recall,” where a blue collar worker in the far future doesn’t know whether he is really a secret agent or just pretending to be one as part of an implanted memory. In Dick’s novel “Time Out of Joint,” protagonist Ragle Gumm gets confirmation that something is terribly wrong with the world around him when he attempts to buy a beer at an...