Ever had to unlearn something, perhaps because you learned in incorrectly the first time around? If you can't, think for a moment about middle school math as there must have been something that went awry in those years.
Unlearning is a critically important skill, mostly because when we learn a concept or a response to a scenario, it often clouds our perspective of viewing differently. Well, perhaps this should apply everywhere but math.
In any case, unlearning in a great way to get to a new place, a new perspective, a new sense of understanding. And this video is a great start.