"In all my years I have never seen such beautiful evening clothes: pray, who is the candidate's tailor?"

     The sole question put by David Hilbert to John von Neumann during the latter's oral examination for the doctorate in mathematics, University of Budapest, 1926, as quoted by George Dyson in Turing's cathedral:  the origins of the digital universe (New York:  Pantheon Books, 2012), 50.