Janet - I think Wicky is right; some people simply ride by feel and do not really know or understand the “why”.
I do know there is an instructor near me who is a graduate of the Cadre Noir (French Cavalry School) at Samur (the same place that produced Jack LeGoff). One of the amazing things about his teaching, especially when working with Pony Clubbers (who need to know HOW to TEACH as well as do) and intellectual adults, is his dialectic style: HE asked the questions, looking for the student to figure out and articulate the answer. That way, he knows you understand intellectually and can verbalize what you feel is going on with you and the horse. He expects you to ask questions, and esepcially when working with a green horse, discuss technique.
Interestingly enough, EVERY pony clubber he has coached to take their B or A exams has PASSED - with flying colors! Most on their first try, no less!