Recently this question about a classic contest problem was closed as a duplicate of another about the same problem. The closed question asks about a specific approach to the problem, though, and how to make it work or why it can't work; the question it was closed as a duplicate of doesn't speak about that approach at all. This meta-question of whether questions are about the problem or about the approach has come up a few times before; see e.g. this. Is this just inevitably a judgement call (plausible), or would it make sense to informally try and lean the site one way or the other in such matters?
(n.b.: I have an answer posted to the question that was closed duplicate, so I obviously have a vested interest here.)