 Similarly rules that generate moral dilemmas are not inconsistent, at least on the usual understanding of that term. Ruth Marcus suggests plausibly that we “define a set of rules as consistent if there is some possible world in which they are all obeyable in all circumstances in that world.” Thus, “rules are consistent if there are possible circumstances in which no conflict will emerge,” and “a set of rules is inconsistent if there are no circumstances, no possible world, in which all the rules are satisfiable” (Marcus 1980, 128 and 129). Kant, Mill, and Ross were likely aware that a dilemma-generating theory need not be inconsistent. Even so, they would be disturbed if their own theories allowed for such predicaments. If this speculation is correct, it suggests that Kant, Mill, Ross, and others thought that there is an important theoretical feature that dilemma-generating theories lack. And this is understandable. It is certainly no comfort to an agent facing a reputed moral dilemma to be told that at least the rules which generate this predicament are consistent because there is a possible world in which they do not conflict. For a good practical example, consider the situation of the criminal defense attorney. She is said to have an obligation to hold in confidence the disclosures made by a client and to be required to conduct herself with candor before the court (where the latter requires that the attorney inform the court when her client commits perjury) (Freedman 1975, Chapter 3). It is clear that in this world these two obligations often conflict. It is equally clear that in some possible world—for example, one in which clients do not commit perjury—that both obligations can be satisfied. Knowing this is of no assistance to defense attorneys who face a conflict between these two requirements in this world.