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Or he could have just said "massive linear algebra"

lol reminds me of that xkcd about Douglas Hofstadter

https://www.xkcd.com/917/

Surely it must have also reminded you of this xkcd: https://xkcd.com/1838/

I hope these don't get downvoted due to merely being humorous, but having taken Andrew Ng's online Stanford class in ML, the takeaway for me was indeed "this is just linear algebra at a massive scale" (fortunately, I enjoy linear algebra!)

ha! I hadn't seen that one

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