Why it works: spotting that something is different is easy. Naming the rule that makes it different is the actual skill — the gap between “that one looks out of place” and “that one is a vegetable, and the other three are fruit”. Every wrong option here has a real reason someone might pick it, so the room has to argue rather than eliminate.
Sets are dealt in a different order every game, and none repeats until the pool runs out. The second point is yours to award — ask for the reason before you reveal, then decide whether it matched.
Ask the team to say which one and why, out loud, in one sentence. The reason is what you are actually assessing — and it is much harder to give than the pick.
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