I've seen more and more questions that are answered in an older question (I'll provide examples tomorrow).
The question itself isn't a duplicate from the original question, however, the answer can be found in the original (most often accepted) answer.
I think of it as a duplicate because there would be no value added to the site. The answer is already on the site. But users that aren't familiar with our site have not seen that answer. I think it's harder to search for it than for a question. The user should really read all the answers of all the related question, and I think that goes a bit too far.
So, what's the proper thing to do with these kinds of questions?
Note: can someone please edit my title? I don't like it, but I don't know how to formulate it better.