There are topics which keep coming back in different forms such as normality testing of random variables. I thought maybe it makes sense to create a question with the best possible formulation, then put a few answers to it referring to good previous answers. This way we'd increase the probability that whoever is looking for an answer will find this Q&A in Google or SE search, and will be satisfied with a complete comprehensive answer. If someone missed the answer, then we'd know that there's this "best answer" to which we'd refer them.
..we'd increase the probability that whoever is looking for an answer will find this Q&A in Google or SE search, and will be satisfied with a complete comprehensive answer.
I guess the result of this idea would not work as expected. It indeed could increase the probability of such posts being found, but would that stop duplicate questions being asked?
My hypothesis is that users who are asking recurrent duplicates do not perform at least a minimum search before posting them.
One partial solution would be to edit the question's title (when it is confusing or disruptive) to reflect more accurately what the post is about. This post contains useful hints for writing SE titles (perhaps we could add something from it to our own faq question post).