I love that quote. In a way, this article is talking about the "unknown knowns" -- the things that are so obvious now that you don't even remember learning them

I love that quote. In a way, this article is talking about the "unknown knowns" -- the things that are so obvious now that you don't even remember learning them, or can't imagine not knowing them. These are the lurking biases and preconceptions that we aren't even aware of having, and may be just as dangerous as the "unknown unknowns".