Horizon problem

Structural Challenge

This response is paired with its canonical Structural Challenge: Horizon problem (P037) in the Physics Structural Challenge Ledger.

τ response

Evidence route

This response is supported by 8 canonical registry items in the τ Corpus.

• V.C17 — Inflaton No-Go Corollary boundary or nonclaim confidence: high
• V.D156 — Inflationary Regime boundary or nonclaim confidence: high
• V.D221 — Export E1: Complete Physical Arena direct problem account confidence: high
• V.P91 — Horizon Framework Account direct problem account confidence: high
• V.T105 — Regime Invariance Theorem boundary or nonclaim confidence: high
• V.T106 — Flatness from Compactness direct problem account confidence: high
• V.T274 — Structural e-Fold Count N_e = 57 boundary or nonclaim confidence: high
• V.T275 — Scalar Amplitude from alpha_tau Inheritance boundary or nonclaim confidence: high

Notes

Verification

• Verification routeempirical_accountability
• Verification statuspending_external_review
• External statusexternally_open

External-review boundary

External cosmology review of the τ formulation versus ΛCDM and dark-sector alternatives; comparison against named experiments (Planck, DESI, Euclid, JWST) where falsification paths exist.

Provenance

• v1 predecessorphys-horizon-problem (promoted one to one)
• v1 mapping recovered fromf534b3fb^

Status disclaimer

A Challenge Response reports the program's current internal stance against a canonical Structural Challenge. It does not imply external verification, scientific consensus, philosophical settlement, or final proof. Read it together with its evidence route, registry references, verification status, and external-review boundary.