There is a sort of riddle game, wherein the person who knows the riddle describes a scene (observation). The other players then ask yes-or-no questions and try to work out what happened based on the answers (i.e. they form hypotheses of what may have happened to result in the initial observation, then ask questions to test those hypotheses).

Some examples of initial observations:

"A man is found naked and dead in the middle of a bare field. He is holding a straw in his hand." (People usually start with questions such as "Was he bleeding?" "Were any bones broken?" "Was there any mud on the ground?" etc.)

"John and Marsha are found dead on the floor in a puddle of water." ("Are any weapons nearby?" "Were John and Marsha in love?" etc.)

A man walks into a restaurant, orders, takes one bite of his selection, then shoots himself. ("Is what he ordered relevant to his suicide?" "Was his food poisoned?" etc.)