I would construct and work along various lines until I found them untenable. When one theory was discarded, I developed another at once. I realized very early that this was the only possible way for me to work out all the problems.
I'd love to be a saxophonist. I don't know why, but I pretend I'm the saxophonist when I listen to music. I have about as much chance playing the sax as I do learning how to fly.