 A salient place to begin is with the grounding relation. As was noted in  Section 1,  grounding has recently been theorized as an asymmetrical explanatory metaphysical relationship (For an introduction to grounding, see the entry on  metaphysical grounding;  for a useful discussion of relevant issues in the context of ethics, see Väyrynen 2013a). It is thus natural to ask whether the non-naturalist could explain the supervenience of the ethical on the base properties by appealing to the fact that: certain facts about the instantiation of the base properties fully ground all facts about the instantiation of the ethical properties.