{
  "version": "v0-step2031-villani-search",
  "step": 2031,
  "generated_at": "2026-09-14",
  "purpose": "Document Villani MacTutor search result from STEP 2031",
  "target_person": {
    "person_id": "person:cedric-villani",
    "bin": "B",
    "bin_index": 17,
    "wikidata_qid": "Q334065",
    "name": "Cédric Villani",
    "context": "French mathematician, Fields Medal 2010 (optimal transport, kinetic theory)"
  },
  "search_result": {
    "verdict": "NOT_FOUND",
    "search_method": [
      "Direct URL guess: Biographies/Villani/, Biographies/Cedric_Villani/, Biographies/Villani_Cedric/, Biographies/Cédric_Villani/ — all 404",
      "MacTutor search endpoint: https://mathshistory.st-andrews.ac.uk/Search/?query=Villani — 26 results mentioning 'Villani' across various pages (Fields Medal honors, conference proceedings, society memberships) but NO dedicated biography page"
    ],
    "closest_hit": "'The institute is now run by Cedric Villani, Fields Medal 2010' — on general Paris walk/history pages, not biography",
    "verdict_details": "Villani does NOT have a dedicated MacTutor Biographies page. The absence is a MacTutor curator coverage gap (curators haven't authored his page yet), NOT a Wikidata P1563 omission."
  },
  "wikidata_p1563_update_proposal": {
    "status": "NOT_APPLICABLE",
    "reason": "Wikidata P1563 (MacTutor Biographies ID) requires an existing MacTutor URL slug to link. Since MacTutor has no biography for Villani, there is no P1563 value to propose. If future MacTutor curators publish a Villani biography, P1563 can be added at that time.",
    "manual_action_required": "None on our side. This is a MacTutor curator decision (they may prioritize deceased mathematicians or specific eras). No proposal to submit."
  },
  "honest_scope": {
    "step_2029_missing_reinterpretation": "STEP 2029 reported '1 missing: B17 Villani, Wikidata P1563 未設定, living Fields medalist で MacTutor mapping 未更新 の 可能性'. The corrected interpretation is: MacTutor itself has no biography page for Villani (not a Wikidata mapping gap).",
    "coverage_upper_bound": "Even with 100% Wikidata P1563 propagation, MacTutor's biographical coverage is bounded by curator decisions. 49/50 = 98% for our seed 50 is close to MacTutor's practical ceiling for our sample.",
    "living_mathematicians_pattern": "MacTutor has biographies for many living mathematicians (Tao, Bhargava, Mirzakhani, Serre, Milnor, etc.) so 'living' alone is not the barrier. The Villani-specific gap is unexplained; may be recency, curator queue, or subject-matter decision."
  },
  "future_actions": {
    "monitor": "Periodically re-fetch Wikidata Q334065 P1563 (annual or on-demand). If MacTutor adds a Villani page and Wikidata reflects it, our fetch script will pick it up next run.",
    "no_workaround": "Do NOT construct a fallback URL. Missing state remains honest disclosure."
  }
}