You provided a lot of great context here that wasn't in the article. I found it suspect to begin with unless he had a lot of knowledge or was exceptional. How d

You provided a lot of great context here that wasn't in the article. I found it suspect to begin with unless he had a lot of knowledge or was exceptional. How did he know how to answer those questions in the first lesson with the mentor unless he already had a strong understanding of chords going into it? In other words, he had enough knowledge that the mentor could accelerate accumulating more on top of it. But he had to have already spent a huge amount of time (equivalent to several college semesters) acquiring knowledge to be at that point. I found the rest of your comment interesting too, but I don't think the overall point of the original article is invalidated, it just needs a caveat. There is no speed limit, except your own ability!