Michael J. Raven

This essay focuses on a recently prominent notion of ground which is distinctive for how it links metaphysics to explanation. Ground is supposed to serve both as the common factor in diverse in virtue of questions as well as the structuring relation in the project of explaining how some phenomena are “built” from more fundamental phenomena. My aim is to provide an opinionated synopsis of this notion of ground without engaging with others. Ground, so understood, generally resists illumination by appeal to more familiar models of explanation. Nevertheless, its distinctive explanatory and metaphysical aspects guide us on characterizing its explanatory logic and its metaphysical features. Some issues concerning the meta-question of what grounds ground are explored, as well as some recent skeptical challenges to ground.

Epistemic objectivists and epistemic subjectivists might agree that inquiry pursues epistemic virtues (truth, knowledge, reason, or rationality) while disagreeing over their objectivity. Objectivists will evaluate this disagreement in terms of the epistemic virtues objectively construed, while subjectivists will not. This raises a rhetorical problem: objectivists will fault subjectivism for lacking some objective epistemic virtue, whereas subjectivists, by rejecting objectivity, won’t see this as a fault. My goal is to end this impasse by offering a new solution to the rhetorical problem. My strategy is to identify a common-ground virtue valuable to objectivists and subjectivists but unavailable to subjectivism. The virtue is usefulness. Subjectivism can be useful only if it relies upon the very objective epistemic virtues it rejects; so it cannot be useful. Whether or not subjectivism has any objective epistemic virtues, it may be rejected as pointless.