This work presents Elastic Spacetime with Scale-Dependent Coupling (ESSC), Version 11,as a structural framework for the coexistence of heterogeneous theoretical descriptionsin contemporary physics. ESSC v11 does not propose new physical laws, particles, fields, dynamics, or predictivemechanisms. It does not attempt unification, reduction, or derivation between theories,nor does it introduce an ontology or a model of physical reality. Instead, ESSC focuses on the structural conditions under which multiple well-establishedframeworks—such as effective field theory, quantum descriptions, and general relativity—can be simultaneously employed without mutual destabilization. Many apparent theoretical conflicts are reinterpreted as consequences of illegitimatetranslation demands, boundary collapse, termination denial, or closure assumptions imposedwhen different descriptions are used together. ESSC formalizes these issues usingnon-quantitative structural axes, multidimensional admissibility conditions, and theconcept of coupled breakdown triggered by a single illegitimate operation. To prevent misuse, ESSC introduces a deliberately restricted descriptive syntax(ESSC Constraint Notation, ECN) and a non-coordinate visual representation(the ESSC Integrated Plate). These tools function as constraints rather than explanatoryor computational devices. ESSC v11 does not resolve foundational problems such as the observer problem or quantumgravity. Its purpose is to clarify which demands must be suspended for coexistence toremain structurally admissible, reframing coexistence as a stable and legitimate modeof theoretical practice grounded in non-assertion and non-closure.
umimoto (Tue,) studied this question.