I am often accused of fabricating false taxi drivers, to create straw-man mouthpieces to embody easily satirised counter-arguments that I want to kick to death in my standup comedy, from the lofty position of a patronising north London liberal elitist with his own column in the Observer. But there’s no need to invent them. My classic “You can prove anything with facts” line, now much beloved by liberal talk radio hosts, was in fact uttered by a driver near the Shepherd’s Bush roundabout on a summer Sunday morning in 1999, while the interminable “If you say you’re English these days...