A conceptual note in the Structural Philosophy / Coherence Cosmology corpus. The invariance of the speed of light is separated into three layers, each given a structural reading. (1) Why is light’s coherence process decomposable at all — why does the all-at-once register, from within a pattern, as a finite process? Answer: the asymmetry of articulation. Light’s trajectory carries coordinates but no internal articulation; mass is an internal clock (de Broglie 1924; Lan et al. 2013; Penrose 2010); one who carries ticks can calibrate what carries none. (2) Why is the rate the same from within every pattern? A candidate axiom, Constitutive Homogeneity — the rods and clocks are woven from the same cloth as the light they measure — translating the constructive lineage (Lorentz; Bell 1976; Brown 2005) into the ontology of patterns. (3) Why this numeral? Convention (CGPM 1983), law (2π/α ≈ 861; α and the electron–proton mass ratio), and inversion: the numeral as the inside-read coarseness of the measurer’s own articulation. Layer (1) is formalized in SR103EN Formalization v2.0 (DOI: 10.5281/zenodo.20643320), whose calibration definition V = A·R derives light’s (1, 0) signature; the homogeneity axiom stands deferred there as the canonical-gauge candidate. A conceptual bridge, not a proof; no new predictions.
Masashi Saito (2026) studied this question.