Reteach · Meet every requirement
100 g, start 10°C, room 22°C, 20 min. Final ≤15°C in EVERY trial; ≤5 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.
Constructed teaching data: these values were invented for this activity, not collected in an experiment.
| Design | Tokens | Added mm | Trial 1 final °C | Trial 2 final °C | Trial 3 final °C |
|---|---|---|---|---|---|
| P | 7 | 14 | 13 | 13.5 | 13 |
| Q | 5 | 21 | 14 | 14 | 14.5 |
| R | 4 | 18 | 14 | 16 | 14 |
| S | 5 | 18 | 14.5 | 15 | 14.5 |
Fictional response: “P wins because all its temperatures are lowest. R also works because its average is below 15°C.”
K6-A1. Evaluate both statements. Check temperatures, budget and thickness separately for every row. Which supplied design meets the whole brief?
K6-A2. Write or say a bounded recommendation that includes its weakest displayed temperature margin and a useful next test. Explain why numerical margin is not a reliability guarantee.
Fresh recheck · What if none qualifies?
100 g, start 10°C, room 22°C, 20 min. Final ≤15°C in EVERY trial; ≤4 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.
Constructed teaching data: these values were invented for this activity, not collected in an experiment.
| Design | Tokens | Added mm | Trial 1 final °C | Trial 2 final °C | Trial 3 final °C |
|---|---|---|---|---|---|
| U | 5 | 14 | 15 | 15 | 15 |
| V | 4 | 19 | 14 | 14.5 | 14 |
| W | 4 | 16 | 14 | 16 | 14 |
K6-A3. Is there a feasible design? Check each failed requirement. Recommend an honest next step without inventing a successful design or changing the rules silently.
Do not choose a winner merely because the question contains design data. “None meets the brief” can be the supported conclusion.