This question has been closed as a duplicate of a question that has been deleted. Is it still a duplicate?
The fact that the source question was deleted isn't proof that the secondary question is not a duplicate. It certainly makes it difficult to see what the similarities are, but it doesn't change the duplication of content. In some scenarios, actually, the deletion of the parent question usually implies that the duplicates should be deleted, as well.
These should probably be handled on a case-by-case basis, not with some general rule, due to the rarity in how often they should come up.
All of the LOTR guide questions were deleted by Jeff because they were kinda abusing the system (they were all the same except for one word)
That one remained because it had an answer. I guess it could (after discussion) be re-opened if you don't create the rest like last time, though you had your answer already.