I didn't know this (I'm not in ML/Data Science) but that looks very helpful. I looked through his learning materials but I have never seen this one though.

Yeah I only happened to know because of ancourse I took that taught some ML. I mentioned it because, later on, I even came across a situation where it would've been directly applicable, but for some reason the thought that it might solve the problem escaped me at that moment, so I asked and someone else had to remind me of that fact... so I feel it's probably not the easiest thing to recognize when it's happening.