A question I posed, Why was Prof. Lockhart in Ravenclaw house, has been flagged as a duplicate because of an answer given to the question, Which house was Gilderoy Lockhart in? that really does attempt to address the question of "why" as well as the question of "which."
Given the meta discussion here and the answer to this meta question, I totally get where the flag comes from and understand how a person searching for my question would, in the end, be led to the answer given.
However, in my mind, the accepted answer to the original question does not satisfactorily answer the question I asked. The answer given, simply speculates that Gilderoy asked to be in Ravenclaw and so he was. This speculation is made on the premise that the hat considers the wearer's choice in house. However, the sorting hat let Harry choose, "not Slytherin," which is actually quite different from a kid specifically choosing a house. Also, there was another suitable house for Harry - I don't know that Lockhart had another suitable option as he clearly was not a hard-worker(Hufflepuff), Brave of heart and chivalrous (Gryffindor), or Intelligent (Ravenclaw - where he was sorted). As far as I know, there is no canon evidence that the hat regularly just lets someone choose just because they are choosing.
If the other question had multiple perspectives addressing both questions, I could see where this would work, or if the answer to the question was absolute fact and backed by a clear canon quote so there was no question as to what the answer was, that would be different, but in this case, the answer given within the answer to the first question is NOT clearly the one and only correct answer to the second question - due to its speculative nature.
In any case, there are points about this other answer than can be argued against, and I'd like a little more analysis, using canon than is offered in the original posting. Is it fair to determine two different questions are duplicates just because one of the questions has an answer that happens to address the other question - especially if that answer is speculative?