We live in a normative universe: a world of rules. Those rules can be legal rules, moral rules, sports rules, rules of the game. They can be formal or informal. On the road, we are subject to traffic rules. At home, we are embedded in frameworks set by rules concerning marriage, childcare, education. And when we tell our children how to behave, we tend to refer to rules. In Peter French’s pithy formulation: “We teach rules, not lives.”