Suppose that question X and question Y are both identification-request questions, and suppose that it turns out that in both cases, the thing to be identified was anime Z. Should question X be marked as a duplicate of Y (or vice versa)?
For example, the question https://anime.stackexchange.com/questions/9949/a-comedy-manga-about-a-guy-who-protects-his-house-from-a-girl-that-comes-from-th was marked as a duplicate of the earlier question https://anime.stackexchange.com/questions/4405/comedy-manga-with-a-16-year-old-boy-from-a-poor-family; both questions were looking for the manga Sakuratetsu Taiwahen. In this case, the answers were the same, but the questions were different.
Contrast this with the question https://anime.stackexchange.com/questions/6721/who-is-this-character, which was closed as a duplicate of What anime is this winking girl from? - in this case, the questions themselves were obviously the same, so I think we all agree that this closure-as-duplicate was correct and appropriate. This is not the type of situation I am talking about in this question.
Relevant discussions elsewhere: