The lower the rank of managers, the more they know about fewer things. The higher the rank of managers, the less they know about many things.
p. 2 cited in: Gregory H. Watson (2010) "By rejecting the status quo, Russ Ackoff took systems thinking to greater heights" in: QP. vol 27, March 2010, p. 30. - A little book of f-laws: 13 common sins of management, 2006