Yesterday, had an exercise (read: "game") in ADR class. Groups of four, each person has a card with X on one side and Y on the other. Each person decides whether to play X or Y, and everyone shows their choice at once. Clear so far? Each group had ten plays.
If everyone plays X, everyone loses a point. If some play X and some play Y, those who played X gain points, and those who played Y lose points. If everyone plays Y, everyone gets a point.
In a class of about 50, maybe three people chose Y everytime. There was no reward for getting the most points, but Professor wanted to see how many points the groups ended up with.
