Donna Spencer has practiced information architecture at the highest levels for more than two decades. She has taught innumerable workshops and courses, and she wrote an entire book on the subject.
Still, to this day, when she teaches IA, she feels inadequate.
This speaks in no way to her professional knowledge or her skills as a teacher. Donna knows this field as well as anyone and speaks eloquently about it. Rather, it gets at the "jigsaw mess" of the practice of information architecture and the constraints of modern educational environments.
https://ellessmedia.com/csi/donna-spencer/