Today I was reviewing question for close and I got this question:
Someone had proposed that this question was an exact duplicate of this question:
Should I have closed the first question as a duplicate of the second question, which is already closed? The biggest problem I see is that the question its a duplicate of has no answers and has a vote count of -5, ie it's a terrible question.
If a user finds the first question and follows the link to the second they'll be more than a bit disappointed:)
As I understand from this answer, it should be impossible for both to be closed and marked as a duplicate.
This might be a duplicate of the following question: