Often when a question comes to Stack Overflow, it gets closed and deleted. It is good in some sense that it reduces the number of duplicates, but it is also a concern that different users use different question titles or Google search queries so as to say to search for an existing answer.
If the question title could be multiple then many differently worded question with same answer would be easier to search. I know maybe not someone may point out that we can choose the best title, but I don't thing there is any "best" way to represent a things. People think differently. Their choice of words are different though they might mean the same.
So, maybe stealing titles from duplicated answers and just using a list of titles for the answer and maybe reward the person with a few reps or maybe nothing, up to you.