Broadly agree—I overstated my point; of course some people don’t have these concepts. But I think there is a big gap between having these concepts as theory (eg IVT in pure math) and applying them in practice to less obvious cases.
(Cf Wittgenstein thought that understanding a concept just was knowing how to apply it—you don’t fully understand it until you know how to use it.)
Broadly agree—I overstated my point; of course some people don’t have these concepts. But I think there is a big gap between having these concepts as theory (eg IVT in pure math) and applying them in practice to less obvious cases.
(Cf Wittgenstein thought that understanding a concept just was knowing how to apply it—you don’t fully understand it until you know how to use it.)