<p>Do you know your Boosterism from your Backstopectomy? Can you tell Prometheus from Cincinnatus, and if so, do you know what Prime Minister Boris Johnson is trying to say when he namechecks esoteric figures from the classics, quotes obscure phrases from history or just makes words up?<br>Certainly, Johnson is the most verbose Prime Minister of recent years, no doubt the result of a classical education, a closet full of public-school confidence ...