This a difference between the ontological (as-is) and the epistemological (as-modeled). I asked pretty much the same thing, you might find some of the responses

This a difference between the ontological (as-is) and the epistemological (as-modeled). I asked pretty much the same thing, you might find some of the responses I got illuminating. [0] [0] https://news.ycombinator.com/item?id=44290902 https://news.ycombinator.com/item?id=44290902