Elon Musk thinks it's almost certain that we're living in some version of The Matrix. In fact, he believes that there's a "one in billions chance" that reality as we know it is not a computer simulation. No, really. You read that right. "The strongest argument for us probably being in a simulation I think is the following," Musk said. "40 years ago we had Pong. Two rectangles and a dot. That's where we were."