There is only one liar

A psychological but fun group dynamics game from Augusto Boal. There should be no talking until the exercise is over. The group sits or stands in a circle and closes their eyes. The leader tells them that one person will be selected by a tap on the shoulder. The leader walks around the whole circle, then asks the group to open their eyes. The group members must look around and try to guess who was chosen. They are asked to remember who they decided upon but not to reveal it at this point.

The game is repeated. When everybody has finished looking round, the leader asks them, on the count of three, without talking, to point at the person they thought was chosen the first time. Everybody points. Now, they do the same again for the second time.

Afterwards, members are asked what it was that led them to choose a particular person, for example, the facial expression that person had. Then, on a signal, they are asked to put up their hands if they were touched the first time. They discover that no one was touched the first time. They are asked to do the same for the second time. The group discover that they were all touched the second time. There is only one liar - the workshop leader!