The Grounding Problem and Non-Optional Metaphysics (MetaEthics)

This paper addresses the grounding problem for moral normativity: how moral requirements can possess unconditional authority rather than merely conditional force. It argues that dominant strategies in ethical theory, including value-based, procedural, rationalist, naturalistic realist, and constitutivist approaches, share a common structural limitation. Each derives normativity from premises that an agent can coherently reject, leaving the resulting authority dependent on acceptance or endorsement. To overcome this limitation, the paper articulates a stricter grounding requirement: a satisfactory foundation for normativity must be non-optional, in the sense that denying it results in performative incoherence, whereby the denial presupposes what it seeks to reject. The paper then argues that two metaphysically minimal structures satisfy this requirement: Reality, understood as the fact that something is the case, and Awareness, understood as the fact that experience occurs. Any intelligible stance, including denial, doubt, or skepticism, presupposes both. On this basis, the paper claims that moral normativity can be grounded in non-optional structures without appeal to evaluative assumptions, justificatory procedures, or privileged conceptions of agency. While the argument does not specify substantive moral content or decision procedures, it aims to show that a non-arbitrary grounding of normativity is possible in principle.