David Jones, The Aha! Moment: A Scientist’s Take on Creativity (Johns Hopkins University Press, 2012), 280 pages, $31.95  Some years ago I was one of the profs in an ABC-sponsored Profs and Pints show, held (alliteratively) in a Perth pub. There were three academics and an audience of about a hundred people crammed in a room which would have comfortably held fifty, and the subject matter was “Minds and Machines”. It was great fun for everybody except those sitting near my grandson, a raucous infant who protested incessantly and had to be hauled away prematurely by my daughter. The audience…