{
 "id": "LIB2-168",
 "entry_version": 8,
 "class": "CLAIM",
 "title": "The trace-built MacDowell–Mansouri action is a signature-sector candidate",
 "statement": "The trace-built MacDowell–Mansouri action is a candidate parent for the signature/Cartan sector, yielding Einstein–Hilbert plus a cosmological term after the Euler discard.",
 "scope": {
  "carrier": "The Cartan/signature-sector traces and curvature form",
  "domain": "The form-calculus action for the named sector only.",
  "group": null,
  "hypotheses": [
   "Use the trace-derived metric and orientation of Proposition 5.3 and the action convention of Named datum 5.4.",
   "The scale registration and dimensionless coupling remain separately priced."
  ],
  "physical_target": null,
  "quantifier": "The registered construction and its stated premises.",
  "real_form": null
 },
 "source_labels_as_printed": {
  "math_status": "NOT_PRINTED",
  "attachment": "NOT_PRINTED",
  "scorecard_tier_word": null,
  "pdf_page": 303
 },
 "house_tier": null,
 "review_state": "PUBLISHED",
 "scientific_status": "UNDER_REVIEW (house status not yet adjudicated)",
 "evidence_status": [
  {
   "kind": "analytic",
   "availability": "shipped"
  },
  {
   "kind": "computational",
   "availability": "unknown"
  }
 ],
 "primary_source": {
  "component": "Appendix T",
  "section": "§5, Named datum 5.4: candidate action",
  "pdf_page": 320,
  "quote": "The signature-sector parent action — candidate"
 },
 "caution": "This candidate is not the full particle, generation, gauge or mass action and does not restore the rejected parent-action route.",
 "candidate_ids": [
  "C2-091"
 ],
 "basis": {
  "pdf_sha256_prefix": "b64ddcd9e16a6dcd",
  "release": "Rev33.1_S369"
 },
 "relationships": [],
 "url": "/library-v2/LIB2-168/",
 "content_sha256": "9de858e717581798e4ec7494a1a91bc2e62f2ebb7673a96efe8b4d4a0cf3899f",
 "build_stamp": "BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02"
}