That's very funny. It's like the time that I was in a pub in Cambridge and the gentleman* next to me said, "Y'know, the US and the UK, they go way back. The US used to be a colony of the UK actually." and I laughed, like, "Yes, and we built our entire national identity off of ending our relationship." He was dumbfounded. He was surprised that I even knew details about it. Which makes me laugh just typing this because of how thoroughly ingrained that information is to many Americans.

*Who, to be fair, had actually been educated at the "other place". (I joke as someone who did not go to college.)