Or he just didn’t pay attention in class when it was taught. A lot of students treat history as irrelevant. It doesn’t help that a lot of public school history teachers are the equivalent of a dad watching World War 2 documentaries. Lots of them basically teach history so they can be a coach instead. Because public schools don’t hire independent coaches, and require all of them to teach something. So the coaches tend to fall into teaching history, because it’s easier than learning to teach calculus or chemistry.