This work presents a conceptually clarified formulation of a universal variational functional intended to stand upstream of all effective physical theories. The construction does not assume spacetime geometry, fields, particles, symmetries, or equations of motion. Instead, it introduces a closed criterion of relational admissibility encoded in a self-referential functional. The variational functional itself carries no physical meaning and generates no observables. Physical structure arises only through variational closure, defined by the stationarity of the functional under arbitrary variations of relational degrees of freedom. The resulting Euler–Lagrange condition is not interpreted as a fundamental law of motion, but as the mathematical expression of admissibility. Within this framework, physical quantities such as mass, energy scales, geometry, and dynamics do not appear at the functional level. They emerge exclusively as invariants of stationary configurations selected by variational closure. The framework therefore constitutes a theory of admissibility rather than a theory of interactions. By separating the definition of admissibility from the emergence of physical structure, the work reverses the standard hierarchy of fundamental physics. Physical laws are shown to arise only after non-admissible configurations have been eliminated. The universal variational functional is presented as a foundational criterion determining the conditions under which physical theories themselves become possible.
Livolsi Edoardo (Tue,) studied this question.