A Unified Theory of Coherence Measurements: A Scale-Invariant, Dynamic Framework for Quantifying Drift and Epistemic Stability Across Domains

Derives a domain-invariant Law of Epistemic Degradation via tolerance-scaled MDIₛcaled, GYORᴹ classification bands, truth-quality tiers (T₀–T₃), and dynamic operators (γᴹ drift, κᴹ collapse, λᴹ opacity, ρᴹ restoration). Five cross-domain falsification probes passed. Three predictions confirmed: velocity vᴹ precedes MDI threshold (early warning) ; high λᴹ produces invisible collapse in T₂/T₃ regimes; restoration requires intervention and is asymmetric. Criticality weighting aligns with Basel and SR 11-7 governance. GCM Observatory Series. CC BY 4. 0. Related identifiers (add each as a “is supplemented by” or “is part of” relation) ∙ https: //doi. org/10. 5281/zenodo. 19005292 — Paper I: Seam Physics ∙ https: //doi. org/10. 5281/zenodo. 18931019 — GCM V1–V3 Observatory ∙ https: //doi. org/10. 5281/zenodo. 18918145 — GCM Geophysical Proposal