Recently, I was able to review some instructor comments regarding the progress of some martial arts students. As I had observed the entire event, it was enlightening to see what other instructors thought of things. It was also eye-opening to me, as a teacher (of the martial arts primarily), to see how a single incorrect assumption developed into a major misunderstanding by the instructor, and by other instructors called on for suggestions. In this case, a student was having difficulty mastering a certain technique. The instructor mistakenly assumed he knew the answer, and that the student was simply not “getting it.” In fact, the student was not “getting it,” but the reason was completely opposite the instructor’s assumption. I remember seeing the misdiagnosis myself. When the event was happening, I remember thinking that the instructor’s diagnosis was wrong. Later, another instructor came along and offered advice that helped the student tremendously. Later still, I did some research o...