YOURSELF: I grab hold of my left thumb and little finger with my right thumb and fingers trying to squeeze them toward each other while I resist. If the statement I make is false, the left thumb and finger collapse toward each other. Otherwise I can resist.
OTHERS: Have them extend their strongest arm straight out to the side, palm down. Have them make a positive statement. While they try to hold the arm up, press down on their forearm with the fingers of one of your hands. The pressure is firm and momentary, increasing to several pounds of force rapidly and then releasing. If their arm goes down, the statement they made was false. (If you have properly prepared them--see later in the lesson.) You can test with statements like "my name is Bozo". Their arm should go down. "My name is (their true name)" should have the result that the arms stays in place.
After a weak test, test again saying "strong test", and it should hold.
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