I was writing a fantastic tale about two little sheep who have nowhere to go but up. The main question that animates the whole story is, will the sheep go up? It seems that they should—they have no reason not to. Certainly, they can’t go any further down. We all have limits.  Anyway, that was the story I was writing, and the writing was going quite well until my wife began changing the words of the story at night, when I wasn’t looking. I’ve got no proof, of course, it’s only a feeling I have, but a strong one. For…