Education is definitely one of them. Kids learn at public schools by accident. Utah has some of the lowest spending on education in the nation and yet it has some of the highest standardized testing scores. Similar to the war on drugs sometimes public education correlates with actual learning, but sometimes arresting people who have drugs lowers drug usage. In both cases we don't actually understand what we're doing.
Maybe fermatslibrary.com is a badly designed website that returns SEO
spam like content depending on such things as IP address, browser or
some other factors.
It's interesting that a URL is no ground truth, and that my comments
below are discussing an entirely different text.
Education is mentioned on the first page in the 6th paragraph.
Upon reading your other comment, it's possible that whatever you are viewing the page on is not rendering the pdf containing the actual text and you are only seeing the annotations.