A: Great question! In the student portal, the “proficiency” comments on the left hand side of the page for white belts applies to the collection of basic technical curriculum comprised of both the first form “Chon Ji” and the first three one-steps.
While it is true that the “knife hand” does not show up in the form Chon Ji, it does show up in one form (forward reaching in one-steps 2 and 3 for white belt). So watch the 1-steps videos for white-yellow belt. When you get to yellow belt you will be introduced to the more conventional knife-hand strike.