This person, Scott Young, did not "master" linear algebra. If anything, he mastered the curriculum. There's a difference, and in a year he won't remember a word

This person, Scott Young, did not "master" linear algebra. If anything, he mastered the curriculum. There's a difference, and in a year he won't remember a word of it. He is, however, a master of self-marketing: "To find out more about this, join Scott's newsletter and you'll get a free copy of his rapid learning ebook (and a set of detailed case studies of how other learners have used these techniques)."