“For a time Joe considered. In his mind he considered his room, the cubicle in which he worked, the loss of his coins, the police—he thought about it all and tried to make it add up. What ties me here? he asked himself. The known, he decided. The fact that I am used to it. You can get used to anything, and even learn to like it. Pavlov's theory of learned reflex is correct; I am held by habit. And nothing more.”