EVERY WEDNESDAY, I teach an introductory fiction workshop at Harvard University, and on the first day of class I pass out a bullet-pointed list of things the students should try hard to avoid. Don’t start a story with an alarm clock going off. Don’t end a story with the whole shebang having been a suicide note. Don’t use flashy dialogue tags like intoned or queried or, God forbid, ejaculated. Twelve unbearably gifted students are sitting around the table, and they appreciate having such perimeters established. With each variable the list isolates, their imaginations soar higher. They smile and