 Beyond these generalities, it is controversial what the Rule of Law requires. This is partly because the Rule of Law is a working political idea, as much the property of ordinary citizens, lawyers, activists and politicians as of the jurists and philosophers who study it. The features that ordinary people call attention to are not necessarily the features that legal philosophers have emphasized in their academic conceptions. Legal philosophers tend to emphasize formal elements of the Rule of Law such as rule by general norms (rather than particular decrees); rule by norms laid down in advance (rather than by retrospective enactments); rule by norms that are made public (not hidden away in the closets of the administration); and rule by clear and determinate legal norms (norms whose meaning is not so vague or contestable as to leave those who are subject to them at the mercy of official discretion). But these are not necessarily what ordinary people have in mind when they call for the Rule of Law; they often have in mind the absence of corruption, the independence of the judiciary, and a presumption in favor of liberty. 