Rule out candidates with every clue until you confirm your diagnosis
Full board from the start
Every candidate is visible right from the start.
Clues stack up
Every new clue is added to the previous ones: you can review them all.
Watch out for discarding the right one
If you discard the correct option at any point, it'll cost you points — you won't find out until the end.
Choose a topic
A «Guess Who?»-style exam: there are several candidates (chemical elements, organs, rocks…) and clues come up one by one. With each clue you rule out those that no longer fit until you are left with the right one. The fewer clues you need, the better your mark.
It makes you use each thing’s properties to reason, not just recognise names: knowing that oxygen is not a metal, or that the stomach belongs to the digestive system, is what lets you cross candidates out.
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