One of the basic errors of logic is to argue from the particular to the general (‘The people getting the dole are a lazy shower – there’s a guy next door to me has turned down two job offers’). So when I see Bono strutting the world pontificating on what the planet needs, I have to remind myself that yes, Bono gets an audience because (i) he is vastly rich; (ii) he fronts a tuneless rock band, but that doesn’t mean everyone who’s famous for one thing can’t talk sense about another.