I do not think they are on-topic, that's why I've written "appropriate". I want to avoid a ping-pong-effect.
This topic was raised here, because of this question.
I think that question is best suited on English.SE, but that's up to them. I do not want these "edge cases" becoming homeless, because neither we nor English.SE want them. Therefore I suggest to just let them stay on this page, if English.SE already decided to kick them.