[msla]

> And suppose Mr. Chav has grown up in England, but is uneducated and isn't even sure who is the Prime Minister.

Easy: The head of lettuce.

More seriously, this stuff comes up with historical events, which is only to be expected given that the human mind is a tale-spinner of ill repute that has a habit of creating and re-creating stories and convincing itself that this new version was the way it really happened. Records might be incomplete, or even wrong, but they don't flip things around quite as avidly as the human mind. Of course, I don't know how much known facts about cognitive science are allowed to inform philosophy...