 LY is clearly absurd. For an action is wrong in virtue of a given fact or set of facts in the intended sense of ‘in virtue of’ only if the fact(s) in question is (or are) moral reason(s) not to perform the action which carry the day. Plausibly, that the fact that an action would be done in a leap year could never itself be a moral reason to perform the  action.[5]  So LY had better come out as false. The vacuity objection, however, insists that LY turns out to be trivially true. Moreover, the objection continues, the reason LY is true carries over to any default principle.