In some sense, yes. I've seen portions of works by people like Newton etc. You had to be a philosopher to read them, much less understand them. In a lot of case

In some sense, yes. I've seen portions of works by people like Newton etc. You had to be a philosopher to read them, much less understand them. In a lot of cases, the same "material" that we learn today required someone to come along later and work out a notation that we can read and teach. My favorite example is the Algebra of Al-Khwarizmi, which contained no numbers, much less equations, but was just a wall of text. In fact, equations were invented later. Also, I think the electromagnetism of Maxwell was reformulated into the equations that we love and cherish by Heaviside.