Bottom line is TF already took his test, and this forum is not the place to retest, non should it be. If you have some problem with something, that is what PM is all about. That way it is between you and him, and not the whole site. You are overly stressing a point, and in turn talking to yourself.I for one think it imortant, for teachers, particularly to be clear in what they are doing. If I make a mistake, as a student, it results in one individual making a mistake. If I make a mistake as an instructor, it can be compounded multiple times.