CONSTITUTION OF THE LUMINOUS LIMIT: a critical–propositional reading of Substantial Spacetime Dynamics (I) Beyond Einstein's Light Speed Postulate, by Hugang Cui, in confrontation with the Theory of Objectivity

This article offers a critical–propositional examination of Hugang Cui’s Substantial Spacetime Dynamics (I) Beyond Einstein’s Light Speed Postulate in systematic dialogue with the Theory of Objectivity (TO). The study investigates Cui’s proposal that the speed of light is not the ultimate ontological limit of nature, but rather a representative manifestation of a deeper constitutive threshold of substantial spacetime, expressed through the framework. The paper analyzes the conceptual architecture of CSSD in confrontation with the foundational, recent, and dialogical bibliography of the Theory of Objectivity. It evaluates possible compatibilities and tensions between Cui’s substantial spacetime ontology and the modal axioms of TO, especially regarding constitutive boundaries, prior structural levels, phenomenic elements, Inductive Effects, the cosmogonic theorem, and the cosmological Eras of TO. It also develops a reinterpretation of the luminous limit in light of the TO understanding of the transcendent element as knowledge or information produced in atomic relations, equivalent to atomic radiations. The article argues that Cui’s framework has genuine heuristic value insofar as it refuses brute fact and seeks a deeper structural explanation for causal limitation, electromagnetic propagation, and the coordination of physical constants. At the same time, it maintains that CSSD remains ontologically incomplete from the standpoint of TO, since it does not yet derive substantial spacetime from deeper modal necessity, nor fully integrate transcendence, informational production, and cosmogonic genesis into a single disciplined framework. As a result, the article proposes a hierarchical conclusion: Cui’s work is treated as a valuable heuristic ontology of structural mediation, while the Theory of Objectivity is affirmed as the deeper modal and cosmogonic discipline required for the full intelligibility of universal limits, constants, and cosmological emergence. Author’s note: This analytical study benefited from the analytical support of ChatGPT. Keywords: Theory of Objectivity; Hugang Cui; substantial spacetime; speed of light; modal ontology; cosmology; phenomenic elements; inductive effects; atomic radiation; Zenodo.