I answered a question about a specific book, Why are place names obscured in Charlotte Brontë's The Professor?, with a very general answer which covers the reasons why place names (or for that matter personal names or dates) are obscured in many other works of literature as well. So far, so good: I might have somewhat overperformed, but my answer does address the original question.
But what happens when people post questions in the future about why place names (or personal names, or dates) are obscured in some other book?
- Technically I could copy-paste the same answer to such questions and it would solve them just as well, but that seems like a waste of having different threads.
- We could close such questions as duplicates since they already have an answer here, but it would seem weird to have a question about Treasure Island or Jude the Obscure closed as a duplicate of one about Bronte's The Professor.
Perhaps the best solution would be to edit the Bronte question to be much more general, about the redaction of names in fictional literature in general, so that my answer still stands but it would make sense to close new questions about this as duplicates. (I'm reluctant to do such a major edit myself, but I've informed Yannis, the OP, about this meta post).
Another possibility would be to post a new question about the general issue of redaction of names in fictional literature, delete my original answer and repost it there, and then close the Bronte question itself (and all later questions on this issue) as duplicates.
This is not a duplicate of Is it fair to change a question after an answer has been provided?, since that was about changing a question to invalidate existing answer(s).