{
 "id": "LIB2-065",
 "entry_version": 9,
 "class": "CLAIM",
 "title": "The loaded first row determines its displayed Vud magnitude",
 "statement": "The retained first-row relation |Vud| = √(1 − |Vus|² − |Vub|²) gives the displayed value 0.97429 and inherits the first-row loading.",
 "scope": {
  "carrier": "The retained CKM first-row relation",
  "domain": "The displayed first-row completion, not an independently selected |Vud| formula.",
  "group": null,
  "hypotheses": [
   "Use the loaded |Vus| and |Vub| entries in the stated unitarity relation."
  ],
  "physical_target": "|Vud|",
  "quantifier": "The registered readout and its stated premises.",
  "real_form": null
 },
 "source_labels_as_printed": {
  "math_status": "NOT_PRINTED",
  "attachment": "NOT_PRINTED",
  "scorecard_tier_word": "Loaded",
  "pdf_page": 58
 },
 "house_tier": null,
 "review_state": "PUBLISHED",
 "scientific_status": "UNDER_REVIEW (house status not yet adjudicated)",
 "evidence_status": [
  {
   "kind": "analytic",
   "availability": "shipped"
  }
 ],
 "primary_source": {
  "component": "Paper 3",
  "section": "§2, First-row unitarity readout",
  "pdf_page": 49,
  "quote": "first-row unitarity gives q |Vud | = 1 − |Vus |2 − |Vub |2 ≈ 0.97429. (3)"
 },
 "caution": "The unitarity-derived value inherits the route choice and is not an independent confirmation of that choice.",
 "candidate_ids": [
  "C2-008"
 ],
 "basis": {
  "pdf_sha256_prefix": "b64ddcd9e16a6dcd",
  "release": "Rev33.1_S369"
 },
 "relationships": [
  {
   "type": "depends_on",
   "target": "LIB2-063"
  },
  {
   "type": "depends_on",
   "target": "LIB2-067"
  },
  {
   "type": "compares_with",
   "target": "SL-14"
  },
  {
   "type": "rests_on_premise",
   "target": "PRM-017"
  }
 ],
 "url": "/library-v2/LIB2-065/",
 "content_sha256": "4c771bc9d9eaccfac0ad2d9d2d9a102a41d70b2971f2851016cf2a25a657c8f4",
 "build_stamp": "BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02"
}