{
  "schema": "reific.reference-evidence.v1",
  "status": "deterministic_public_data_replay",
  "question": "Where is the largest CO2 rise across 30 consecutive sampling intervals, and do those sensor readings alone confirm room occupancy?",
  "source": {
    "dataset": "UCI Occupancy Detection",
    "doi": "10.24432/C5X01N",
    "file": "datatraining.txt",
    "sha256": "b2c4d0ce2b9e4e453c476f7125ef31aeec2d1f5c7f5572d0e80de3df6521ab56",
    "row_numbering": "1-based physical CSV lines; header is line 1",
    "timezone": "not supplied; retain source-local timestamps"
  },
  "coverage": {
    "start": "2015-02-04 17:51:00",
    "end": "2015-02-10 09:33:00",
    "samples": 8143,
    "cadence_seconds_min": 59.0,
    "cadence_seconds_max": 61.0,
    "missing_CO2_values": 0,
    "candidate_windows": 8113,
    "withheld_columns": [
      "Occupancy"
    ]
  },
  "finding": {
    "type": "maximum_30_interval_CO2_rise",
    "start": "2015-02-09 21:40:59",
    "end": "2015-02-09 22:11:00",
    "elapsed_seconds": 1801.0,
    "start_CO2_ppm": 650.0,
    "end_CO2_ppm": 1365.0,
    "rise_ppm": 715.0,
    "penultimate_CO2_ppm": 619.0,
    "following_CO2_ppm": 894.0,
    "source_rows": [
      7432,
      7433,
      7434,
      7435,
      7436,
      7437,
      7438,
      7439,
      7440,
      7441,
      7442,
      7443,
      7444,
      7445,
      7446,
      7447,
      7448,
      7449,
      7450,
      7451,
      7452,
      7453,
      7454,
      7455,
      7456,
      7457,
      7458,
      7459,
      7460,
      7461,
      7462
    ],
    "observed_CO2_ppm": [
      650.0,
      652.0,
      653.5,
      652.0,
      647.5,
      646.0,
      645.0,
      712.5,
      759.0,
      655.666666666667,
      660.5,
      657.5,
      640.0,
      641.0,
      639.0,
      634.0,
      632.0,
      637.5,
      662.0,
      646.5,
      629.0,
      622.0,
      621.666666666667,
      627.0,
      630.0,
      625.5,
      617.0,
      614.5,
      613.0,
      619.0,
      1365.0
    ],
    "ties_at_maximum": 1,
    "occupancy_conclusion": "not established from these readings alone"
  },
  "limits": [
    "A rise in CO2 does not by itself prove occupancy, the number of people, or a ventilation fault.",
    "Labels were withheld before window selection and payload construction.",
    "Selection uses the observed series retrospectively; this is not an early-warning experiment.",
    "No classifier or language model was evaluated; predictive accuracy is unmeasured."
  ],
  "next_evidence": "Review separately recorded occupancy observations and ventilation state before choosing an action."
}