Generalized Identity, Zero-Ground, and Necessity

This paper offers a modification of Fabrice Correia’s and Alexander Skiles’ ( Grounding, Essence, and Identity ) definition of grounding in terms of generalized identity that extends it to zero -grounding. The definition promises (1) to improve our understanding of zero-grounding by capturing it within the framework of generalized identity, and (2) to unlock the theoretical potential of zero-grounding for Correia’s and Skiles’ account. The latter is demonstrated by arguing that the definition allows an essentialist theory of modality based on Correia’s and Skiles’ account to answer a recent explanatory challenge by Jessica Leech ( From Essence to Necessity via Identity ) by combining the following two ideas: (1) Some necessities are grounded in truths about zero-grounding, and (2) at least some identity-propositions are zero-grounded. Finally, some advantages of the zero-grounding approach over Correia’s and Skiles’ recent definition of necessity in terms of generalized identity and logical consequence are argued for.