Against cross-world anchoring

A social fact S is grounded by some plurality of grounds. And the fact that S has the grounding-conditions it does is anchored by some set of anchors. Epstein has recently suggested (2019) that the anchoring relation is a cross-world determination relation. In this paper we put forward three arguments against this view. First, we argue from the analogy between social and non-social kinds: there is no cross-world determination involved in non-social natural kinds. Secondly, we take issue with the very idea of cross-world determination: no determination relation in our current metaphysical toolkit can have relata that occupy different possible worlds (in the relevant sense). Thirdly, we argue that cross-world anchoring generates an indeterminacy problem: if S holds in an anchorless world w, and there are distinct anchors (for S) holding at w₁ and w₂ respectively, then it is indeterminate whether S’s grounding-conditions hold in virtue of the w₁-anchors or the w₂-anchors.