Cosmological principle

Structural Challenge

This response is paired with its canonical Structural Challenge: Cosmological principle (P015) in the Physics Structural Challenge Ledger.

τ response

Evidence route

This response is supported by 5 canonical registry items in the τ Corpus.

• V.R248 — Part VI Achievement Summary bridge structure confidence: high
• V.C20 — Global Finiteness bridge structure confidence: high
• V.D226 — Export E6: Cosmological Endstate downstream application confidence: medium
• V.R400 — BAO–CMB Pipeline Closure formalization support confidence: medium
• V.P138 — CMB-S4/PTOLEMY/DESI Falsification Suite downstream application confidence: medium

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-cosmological-principle (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.