After a review of terminology, I identify—in addition to Margaret Battin’s list of five primary arguments for and against aid-in-dying—the argument from functional equivalence as another primary argument. I introduce a novel way to approach this argument based on Bernard Lonergan’s generalized empirical method. Then I proceed on the basis of GEM to distinguish palliative sedation, palliative sedation to unconsciousness when prognosis is less than two weeks, and foregoing life-sustaining treatment from aid-in-dying. I conclude that aid-in-dying must be justified on (...) its own merits and not on the basis of these well-established palliative care practices; and that societies must decide, in weighing the merits of aid-in-dying, whether or not to make the judgment that no life is better than life-like-this part of their operative value structure. (shrink)