Through my working life I've had to deal with all kinds of people, people of all sorts, holding all sorts of jobs, professions etc, including teachers, I've got teachers in my own family, now of all the professions I've had to deal with, teachers it seems to me that a considerable amount of them, not all, have this mistaken idea that now they they have acquired their teaching degree and at the same time by some miraculous piece of fate they have also acquired the entire knowledge of the universe; you don't need to look very far on the forum to find an example of this phenomenon.
ippy