A unit commander noticed one of his soldiers behaving oddly. The soldier would pick up various pieces of paper that he found lying around, frown and say, “That’s not it” and put them down again.
This went on for some time, until the commander arranged to have the soldier psychologically tested.
The psychologist concluded that the soldier was deranged, and wrote out a recommendation for discharge from the army.
The soldier picked it up, smiled and said, “That’s it.”