August 15, 2026
Closed Door
A 3-minute critical thinking challenge. Solve first, then compare your answer against the model bench.
Daily challenge switches at midnight in Europe/Amsterdam.
Daily challenge · Critical thinking · 3 min
Closed Door
00:00
A lab has a simple automation rule.
- Whenever the alarm rings, the door closes.
- This morning, the door was closed.
What can you conclude?
Solve without AI first. The model comparison appears only after you lock in.
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