“Both of these bizarre events put one in mind of a simple but arresting thesis: that we are living in the Matrix, and something has gone wrong with the controllers. This idea was, I’m told, put forward first and most forcibly by the N.Y.U. philosopher David Chalmers: what is happening lately, he says, is proof that we are living in a computer simulation and that something has recently gone haywire within it. The people or machines or aliens who are supposed to be running our lives are having some kind of breakdown. There’s a glitch, and we are in it.”