{
  "title": "Separate earlier positions from later findings",
  "kind": "Real case; attributed paraphrases from NTSB reconstruction, not a transcript or a liability finding",
  "positions_date": "5 February 2023",
  "scale": "Parallel statements; box spacing does not encode elapsed time",
  "positions": [
    {
      "party": "Oxy Vinyls",
      "time": "Afternoon",
      "precision": "Part of day",
      "account": "Teams agreed that polymerization was not taking place."
    },
    {
      "party": "Norfolk Southern",
      "time": "6:00 p.m.",
      "precision": "Time stated in digest",
      "account": "Told NTSB polymerization was taking place; proposed vent and burn."
    }
  ],
  "later_finding": {
    "party": "NTSB",
    "date": "25 June 2024",
    "date_nature": "Final report date; corrected edition reissued 23 July 2024",
    "account": "No evidence of polymerization. Vent and burn was unnecessary to prevent a tank rupture caused by that reaction.",
    "source_url": "https://www.ntsb.gov/investigations/AccidentReports/Reports/RIR2405%20CORRECTED.pdf",
    "locator": "Printed p. 149 (necessity) and p. 151 (evidence)"
  },
  "positions_source": "https://www.ntsb.gov/investigations/AccidentReports/Reports/SPC2406.pdf#page=6"
}