A Shock to Them I'd Imagine

One of my fellow students was on the same train today and we got to talking. Nice guy. He was telling me about this girl in one of his other classes, who apparently asked him what the difference was between English and British.
'I couldn't believe she didn't know that they're exactly the same thing!' he said.
I didn't say anything. Maybe I should have. How many people will she tell? How many students will they both teach this to? If enough people believe it, will that eventually make it true?

Got choked with my own arm at training tonight. Hurts when I swallow.