 The tension is this: On the one hand, you must act out of the moral law because you cannot opt out of the game of Intendo; that is why morality is binding. On the other hand, however, you may lie to the murderer at the door, because he has opted out of the game of Intendo. Schapiro provides a label for what she intends as a way of splitting the difference: the murderer is betraying the generic practice without opting out of it. But the distinction marked by the label is as yet unexplained. The further development of the practice view will be shaped by the need to accommodate these apparently conflicting theoretical constraints.