Clifford Geertz claims that in a well-functioning legal system there should be a fit between what Geertz calls the “if, then” structure of legal rules and the “as, therefore” structure of legal decisions. Put simply, for a system of laws to work, the legal rules used to decide cases must make sense given how one understands the cases to which they are applied, and the resolution of the case must make sense given the legal rule chosen to decide it. There must be, in a well-functioning legal system, a fit, a symmetry, between the rules allegedly used for deciding cases and the actual practice of deciding cases. For Geertz, the following question always makes sense in a legal system: “How, given what we believe, must we act; what, given how we act, must we believe.” Geertz recognizes that his question parallels the sorts of questions that Nelson Goodman asks in epistemology, or that John Rawls asks in ethics, and he embraces what I take to be a Goodmanian, holistic approach to codifying the rules that govern practices.