Snake oil. This is not really explaining components of models as much as it's characterizing sensitivity to certain types of inputs, with humans labeling those types. It doesn't scale and it doesn't explain
That's really an interesting question. Even mathematical proofs are not really 100% rigorous. They are really about convincing others and it's really dependent on the others knowledge. As an engineer I would require much more detailed steps than a mathematician to accept a proof (if we engineers cared about that, of course).
So, to summarize, an explanation is really an ill defined concept.