A counterexample is a variant of the typical mind fallacy: if you perfectly understand something, it feels so obvious that you tend to forget what was not obvious before. So professors are regularly worse at explaining a difficult concept than teaching assistants: because the latter still know what makes it hard to understand.
A counterexample is a variant of the typical mind fallacy: if you perfectly understand something, it feels so obvious that you tend to forget what was not obvious before. So professors are regularly worse at explaining a difficult concept than teaching assistants: because the latter still know what makes it hard to understand.