Many, I would argue. Just a statement of fact, no judgement. When I took advanced physics classes in 3rd year of undergrad, I was surprised to note that many o

Many, I would argue. Just a statement of fact, no judgement. When I took advanced physics classes in 3rd year of undergrad, I was surprised to note that many of my very smart friends who were computer science majors had lost touch with high-school and introductory college math (particularly calculus) because of an immersion in different kinds of stuff for 2-3 years. Similarly, I've sat in on machine learning classes where CS grad students have little knowledge of probabilistic reasoning or linear algebra (both of which I would consider high-school math, or early college level). It's not surprising that someone who's not written code for a decade will have a tough time jumping in to start programming right away. So, what's so special about math? It just so happens that some texts on functional programming use a different starting point to approach programming, with different pre-requisites. I wouldn't be surprised if people lose touch with these things after a decade of not using/needing them.