{
  "PF-D-A0": {
    "id": "PF-D-A0",
    "head": [
      "Paired trial",
      "Sleeve H final °C",
      "Sleeve J final °C"
    ],
    "rows": [
      [
        1,
        32,
        34
      ],
      [
        2,
        31,
        33
      ],
      [
        3,
        32,
        34
      ]
    ],
    "kind": "paired",
    "start_C": 38,
    "room_C": 20,
    "elapsed_min": 12,
    "mass_g": 100,
    "conditions": "Fresh matched 100 g covered water samples start at 38°C in 20°C surroundings. 12 min; all cups/lids/exposure/readout match. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
    "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment."
  },
  "PF-D-A1": {
    "id": "PF-D-A1",
    "head": [
      "Setup",
      "Water g",
      "Start °C",
      "After 12 min °C"
    ],
    "rows": [
      [
        "H only, 25°C room",
        100,
        38,
        35
      ]
    ],
    "kind": "changed_one",
    "conditions": "New record: only H tested in 25°C surroundings. 100 g starts at 38°C; 12 min; other stated procedures match initial record. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
    "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment."
  },
  "PF-D-B0": {
    "id": "PF-D-B0",
    "head": [
      "Design",
      "Tokens",
      "Added mm",
      "Trial 1 final °C",
      "Trial 2 final °C",
      "Trial 3 final °C"
    ],
    "rows": [
      [
        "R",
        4,
        15,
        16,
        16.5,
        16
      ],
      [
        "S",
        6,
        18,
        15,
        15.5,
        15
      ],
      [
        "T",
        5,
        16,
        15,
        17.5,
        15
      ]
    ],
    "start_C": 12,
    "room_C": 24,
    "elapsed_min": 15,
    "mass_g": 90,
    "criterion_max_C": 17,
    "token_max": 6,
    "thickness_max_mm": 18,
    "conditions": "90 g, start 12°C, room 24°C, 15 min. Final ≤17°C in EVERY trial; ≤6 tokens; ≤18 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
    "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
    "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
    "kind": "design_trials",
    "trial_ids": [
      "1",
      "2",
      "3"
    ],
    "units": {
      "temperature": "°C",
      "time": "min",
      "mass": "g",
      "thickness": "mm",
      "resources": "fictional tokens, not money or energy"
    }
  },
  "PF-D-B1": {
    "id": "PF-D-B1",
    "head": [
      "Design",
      "Tokens",
      "Added mm",
      "Trial 1 final °C",
      "Trial 2 final °C",
      "Trial 3 final °C"
    ],
    "rows": [
      [
        "R-tight",
        5,
        15,
        15.5,
        16,
        17.5
      ],
      [
        "S-thin",
        6,
        16,
        15.5,
        16,
        16
      ]
    ],
    "start_C": 12,
    "room_C": 24,
    "elapsed_min": 15,
    "mass_g": 90,
    "criterion_max_C": 17,
    "token_max": 6,
    "thickness_max_mm": 18,
    "conditions": "90 g, start 12°C, room 24°C, 15 min. Final ≤17°C in EVERY trial; ≤6 tokens; ≤18 mm added thickness. Covered liquid water; cups/lids, mass, starting temperature, duration, exposure and reading procedure match within and across trials. Surroundings stay at the stated room temperature. No ice, phase change, active heating/cooling, direct sunlight or meaningful evaporative cooling. Each trial uses fresh samples. Accuracy is not supplied.",
    "provenance": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
    "disclosure": "Constructed teaching data: these values were invented for this activity, not collected in an experiment.",
    "kind": "design_trials",
    "trial_ids": [
      "1",
      "2",
      "3"
    ],
    "units": {
      "temperature": "°C",
      "time": "min",
      "mass": "g",
      "thickness": "mm",
      "resources": "fictional tokens, not money or energy"
    }
  }
}