{
 "id": "LIB2-061",
 "entry_version": 12,
 "class": "CLAIM",
 "title": "The reactor-angle formula retains an unforced round-trip readout",
 "statement": "The retained reactor-angle formula is sin²θ13 = sin⁴(π/8); its round-trip T² squaring (the round-trip framing, exponent 2) is identified but not forced from first principles.",
 "scope": {
  "carrier": "The registered reactor-angle readout",
  "domain": "The retained structural formula, not a uniquely forced reactor-angle law.",
  "group": null,
  "hypotheses": [
   "The round-trip framing T² and its squaring are used.",
   "The exponent choice remains an identity/heuristic selection."
  ],
  "physical_target": "sin²θ13",
  "quantifier": "The registered readout and its stated premises.",
  "real_form": null
 },
 "source_labels_as_printed": {
  "math_status": "Structural",
  "attachment": "NOT_PRINTED",
  "scorecard_tier_word": "Structural",
  "pdf_page": 58
 },
 "house_tier": null,
 "review_state": "PUBLISHED",
 "scientific_status": "UNDER_REVIEW (house status not yet adjudicated)",
 "evidence_status": [
  {
   "kind": "registry",
   "availability": "shipped"
  }
 ],
 "primary_source": {
  "component": "Paper 5",
  "section": "§2, Reactor-angle expression",
  "pdf_page": 83,
  "quote": "sin2 θ13 = sin4 (π/8)"
 },
 "caution": "Identifying the round-trip construction does not select its physical readout or promote the formula to a theorem.",
 "candidate_ids": [
  "C2-006",
  "C2-060"
 ],
 "basis": {
  "pdf_sha256_prefix": "b64ddcd9e16a6dcd",
  "release": "Rev33.1_S369"
 },
 "relationships": [],
 "url": "/library-v2/LIB2-061/",
 "content_sha256": "c250d9bd0df5977478f385144a46dae325cedf2682ca3660022890eedc7cf3fc",
 "build_stamp": "BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02"
}