Most programs you write are very concrete. Concrete programs can have concrete variable names. Then the more you abstract things the less variable names matter

Most programs you write are very concrete. Concrete programs can have concrete variable names. Then the more you abstract things the less variable names matter. If you create a general purpose list calling its content type "item" or "x" are both equally readable since "item" doesn't say anything that "x" doesn't. Now math, the entire subject of math is just a bunch of abstractions. Now there are a lot of concrete applications of math, but math itself isn't concrete.