" But it if was helping him, what would the criterion be? I mean, you know, if he only dreamed that he heard a voice telling him what to do, how to do it, this is a phantasm of his own mind. And yet, if the results are the same … It raises … Oddly enough, Paul, you’ll be amazed to discover that I tend to want to treat the questionness of what is real. "

― Philip K. Dick