The trouble about ignorance is that it’s easy to be impressed by presumed knowledge. There are so many times I have been “blown away” by the incredible knowledge of a scholar who sounds so erudite, intellectual and wise – because it is a field alien to me. But when they have opened the mouths on matters I am familiar with, they have come across as shallow, unreliable and confused. The danger of speaking outside you area of expertise, perhaps. Or simply the folly of leading the unlearned.