Professor Matti Bergstrom's pamphlet on why politicians' brains are different has proved a mite contentious. They disagree with his finding that the part of the brain that deals with evaluation and decision-making is sometimes faulty in the very people we han decision-making to.
Bergstrom reckons politicians are "value invalids" who are control freaks, love order and hate chaos.
Quite what he made of Nicol Stephen, Deputy Education Minister, who delivered the set-piece speech, remains a mystery. At least the minister should be well-equipped for one of his roles: monitor of the Scottish Qualifications Authority.
Where there is chaos . . .