Debates over natural law routinely confuse three quite different sets of issues. First, there are the properly philosophical questions of (i) whether a natural law exists, and (ii) whether positive laws are valid completely apart from their moral specifications. Second, there are questions that properly belong to political theory. These include, (iii) how a constitution ought to allocate responsibility to make natural justice effective, and (iv) how a particular system of positive law handles this issue. Third, assuming that a judiciary is limited by written law, it can still be asked whether this necessarily prohibits judicial uses of natural law theory. Questions at these different levels are sufficiently different that what it takes to solve a question at one level does not necessarily carry over to the others. It is vain, therefore, to search for a single method that brings closure on these issues.