I also have a liberal arts education, but those fruitful years were reserved for prevaricating on and dissecting various obscure and convoluted logical arguments related to phenomenology.
Thus, what passes for a "standard high school education" in the United States varies wildly -- in some schools, you can graduate without even being able to read and comprehend a magazine article. In others, the top graduates often find Harvard less intellectually rigorous than their high school (because Harvard has to help their students from worse high schools catch up).
If you assume everybody on HN is an American, maybe.
I also attended a French school, where it was covered, and I've had at least one conversation with my Norwegian family in which it came up.