Working from the answer makes sense. That is an interesting way to engage the top down thinker. I think a lot of the pushing forward is to find the big concept buckets to put other things under. In that way, needed topics being missed isn't relevant, because by their very nature when they hit a topic where they are missing requisite knowledge the drive to backfill to move forward is likely stronger and more effective than trying to teach it in a typical linear and bottom up approach that most people need.