On the question here, it was eventually discovered that this question was a duplicate; however, if we go through the same process that the OP has done and craft a question as they have (with the same title that is), the possible duplicate (which is practically a near-perfect duplicate other than the earlier question not giving a hint as to the limit) does not show up in the recommendations. Even the seemingly minimal search phrase
does not recommend a previous question slightly related. In all reasonableness, if I were asking this question I would not have believed I were asking a duplicate question. Furthermore, if I take parts of the old question and search for questions with the same string, the new question doesn't pop up.
Even though I have the accepted answer on the duplicate, I wouldn't mind if the question was closed as a duplicate and a moderator would merge the answers (I hate duplicates). However, the old question with the same title would remain as blind to the new question with the same title, and I imagine the question would creep up again. They're both reasonable titles and formulations.
I further imagine that this certain predicament happens occasionally.
What does the community think should be the course of action here? When a question is, strictly speaking, an exact- or near-duplicate of a previous question, but both questions are effectively blind to each other through the search algorithm.
Jeff Atwood has a recommendation, and this the first time I've thought his argument has some merit.