This weekend I re-read 1984, a book I tend to reach for when I get Defcon-1 depressed about the state of the world. Deep in the novel, Winston ponders the intricacies of doublethink: To know and not to know, to be conscious of complete truthfulness while telling carefully constructed lies, to hold simultaneously two opinions which canceled out, knowing them to be contradictory and believing in both of them… To forget whatever it was necessary to forget, then to draw it back into memory again at the moment when it was needed, and then promptly to forget it again… that was the ultimate subtlety…