An MBTI class dramatically shows the differences between types. The trainer forms groups according to type. There are profound differences in the ways groups do tasks and answer questions. This section shows that Miyamoto Musashi was far ahead of the psychologists. Dr. Laurence Peter was not the first person to recognize this principle.
Scientists rely heavily on direct observation and physical laws.
Becoming and succeeding as a direct manager thus requires at least three skills. Progression to and success in these levels requires all four skills. Clausewitz' field marshal, like the upper manager, needed intuitive and thinking skills. He needed an intuitive grasp of the big picture. He had to perceive the overall situation through the fog of war.