“When you close the loop, you eliminate the precedent that allowed the commute to occur in the first place. You’re talking about two points on a line, except that the difference here is that one point not only led to the other, it is responsible for the second point’s existence through direct action. What happens when you sever that link? One goes on, one doesn’t? Both go on? Neither? Read every book ever written with some hokey plotline like that, they’ll never agree. What you’re dealing with is an exercise of the imagination.”
