PHYSICAL ENFORCEMENT AS NECESSARY AND SUFFICIENT FOR REALITY

This paper establishes a mechanism-only definition of physical reality by identifying enforcement as both the necessary and sufficient condition for physical existence. Using elimination by logical necessity, it shows that when enforcing mechanisms—force, energy and momentum exchange, reciprocal back-reaction, locality, and irreversibility—are removed, physical evolution ceases, while removing descriptions, laws, constants, or representations leaves physical evolution invariant. The result is a strict separation between mechanisms that act and descriptions that summarize, positioning enforcement as the sole criterion of physical reality within the framework.