I think there are very few rules that can’t be broken. I think there is only one that is very difficult to break. I have seen it broken, but not very often. It’s that something has to change. From the beginning of the story to the end, something needs to be different. The only time I’ve ever seen it successfully broken was a Grace Paley story called “A Conversation With My Father.” But as a general rule, something has to change. There has to be some source of tension.