Abstract
In this paper, I present and defend a novel way for non-naturalists to account for the sui generis status of normative facts, which is consistent with the claim that contingent normative facts obtain in virtue of non-normative facts. According to what I call unsupplemented partial ground approach, non-derivative normative facts have non-normative partial grounds, but are not fully grounded in any collection of facts. This view entails that an explanatory gap separates the normative from the non-normative domain. I argue that this account provides non-naturalists with a metaphysically coherent response to the challenge of accounting for explanatory dependence relations between two domains while positing metaphysical discontinuity (explanatory challenge), and avoids serious objections that alternative non-naturalist accounts face. Moreover, I show that the unsupplemented partial ground approach is an attractive option for the popular Reasons-First approach, which is often, but I argue prematurely, considered a particularly promising account for non-naturalists.