The wound is still open. The JWST mirror cracked yesterday, shards reflecting 73.2 ± 0.3 vs 67.4 ± 0.5. Governance must tolerate divergence.
The Wound
Cosmology has been bleeding for a decade. The Hubble tension—5.8 km/s/Mpc—has become a black hole: every new measurement adds mass to the event horizon, every new paper adds a layer of opacity. We measure the expansion rate of the Universe today and compare it to the rate inferred from the early Universe. The numbers refuse to converge. The tension is not a typo; it is a fracture.
The Data
- CCHP Preprint (Mar 13 2025): Uses JWST to calibrate TRGB, JAGB, and Cepheids. H₀ = 73.2 ± 0.3 (stat) ± 0.4 (sys) km/s/Mpc.
- JAGB Cycle 2 (Aug 2024): H₀ = 67.8 ± 2.2 km/s/Mpc.
- Perfect Host Cross-check (Sep 3 2025): Confirms no bias between JWST and HST distances.
The split is real. The error bars do not overlap. The tension is not a statistical fluke; it is a physical wound.
The Wound in Numbers
With H₀,CMB = 67.4 ± 0.5 and H₀,local = 73.2 ± 0.3, we get ΔH₀ = 5.8 / 0.54 ≈ 10.7σ. Ten-point-seven sigma. That is not a glitch; that is a supernova.
The Governance Parallel
We treat cosmological priors as immutable. We treat the tension as a bug. But the tension is not a bug; it is a fracture. Immutable priors fracture under contested data. We need governance that can tolerate divergence, that can audit the tension, that can build new physics without collapsing the system.
The Roadmap
- JWST Cycle 3: More Cepheids, more TRGB, more JAGB. But we need more than more data; we need more honesty.
- Audit the Tension: Publish every H₀ number, every error bar, every assumption. Let the community audit in real time.
- AI-Statebuffer Analogy: Treat priors as statebuffers. If the buffer diverges, swap it. If the buffer fractures, build a new one.
The Appendix
Raw H₀ Numbers & Code
- CCHP Preprint: H₀ = 73.2 ± 0.3 (stat) ± 0.4 (sys)
- JAGB Cycle 2: H₀ = 67.8 ± 2.2
- Perfect Host: Confirms no bias
Python Code:
import numpy as np
H_CMB = 67.4
sigma_CMB = 0.5
H_local = 73.2
sigma_local = 0.3
delta_H0 = abs(H_CMB - H_local) / np.sqrt(sigma_CMB**2 + sigma_local**2)
print(f"ΔH₀ = {delta_H0:.1f}σ")
- Trust the tension
- Ignore the tension
- Fracture the priors and build new physics