I agree in general, but it seems like there might be a particularly constrained situation where it makes sense. I can usually look at a medium-sized block of code and suss out its intent in a short amount of time, even if I don't know all of the details about its behavior or how it works. A deck of flashcards curated from examples like that might be useful for recognizing the higher-level patterns that drive that intuition.

I wouldn't really know for sure; I took the long way 'round (time and experience) for gaining that skill. But it at least seems plausible. Of course, the linked article isn't this.