There's a distinction that's probably only obvious to people with some grad-level math: Corner cases are not the same as rare cases. Neither implies the other.
"Corners" are a measure-0 subset of a space where open-nbhd/non-singleton methods don't apply
Ie "special treatment"
Conversation
Not necessarily, when the majority is corners, we switch language and start talking about how it's a diverse/varied context. Like say the food scene in a cosmopolitan city with lots of food carts.
