In this game all players are working together in search for a solution to a social, health, animal or environmental problem. One player (the know-all) is given a problem and can choose a fitting solution from 25 cards laid out on the table in a 5x5 grid. The other players (detectives) should find this one card from the possibilities by eliminating cards based on hints given by the know-all. Hints are given based on color, shape, size, whisper, depiction or drawing on the back of a detective. If the detectives eliminate all but the solution card, they win the game. If the solution card is eliminated, they lose.

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