 These claims reflect how use of the word ‘supervenience’ has come to be usefully regimented in contemporary metaphysics. It is worth emphasizing this point, because there is a significant history of the word being used in ways that depart from this contemporary orthodoxy. For example, for a time it was quite common both in metaphysics and in ethics for ‘supervenience’ to be used to mark an asymmetrical dependence relation. Such uses are, however, inconsistent with the contemporary regimentation. This is a point about terminological clarity, not a substantive barrier to discussing such asymmetric relations. For example, one could name the asymmetric relation that holds when A supervenes on B but B does not supervene on A. Or one could name the relation that holds when the supervenience of A on B is accompanied by an adequate explanation. One influential variant of the latter sort of explanatory relation has been dubbed ‘superdupervenience’ (Horgan 1993, 566). More recently, many philosophers have suggested that a certain asymmetric dependence relation—grounding—is of central importance to our metaphysical theorizing. (For discussion, see the entry on  metaphysical grounding.)