Suppose I have seen an answer to a question by a user X.

Suppose another user Y leave a comment under X's answer. This comment received good number of up votes (6 as of now). This comment is not explicitly mentioned in any other answers

Is it OK if I can make this comment as a CW answer giving appropriate credit for the user Y?

That question already has many answers, along with an accepted answer.

  • 3
    $\begingroup$ A related older post: Questions answered in a comment. $\endgroup$ Jun 1, 2020 at 7:41
  • $\begingroup$ @MartinSleziak but that question already have many answers, along with an accepted answer... $\endgroup$ Jun 1, 2020 at 7:44
  • 5
    $\begingroup$ Yes, it's encouraged. Usually I do so after suggesting to the commenter to write an answer and waiting for a few days. Conversely it occurred to me to write an answer after being encouraged to do so after a comment (preferably cw if it's just a reference). $\endgroup$
    – YCor
    Jun 2, 2020 at 14:15
  • $\begingroup$ @YCor "and waiting for a few days." +1 Ok.. $\endgroup$ Jun 2, 2020 at 14:25
  • $\begingroup$ PS I was mainly addressing the case of a question answered in comments. You should do this only if there is good reason to promote the question to an answer. For instance, if it's a good alternative answer. Maybe also if it fixes or improves the existing answer, in case the answerer doesn't want to modify the answer. Or possibly for some other reason (would you point to the post(s) you have in mind?) $\endgroup$
    – YCor
    Jun 2, 2020 at 14:33
  • $\begingroup$ @YCor I am referring to comment mathoverflow.net/questions/119699/… $\endgroup$ Jun 2, 2020 at 15:08
  • $\begingroup$ Isn't it fine as a comment? $\endgroup$
    – YCor
    Jun 2, 2020 at 15:32
  • $\begingroup$ @YCor The point that sheafification functor may not exists for a large category seems (to me) to be an important thing and that is what Urs said in his comment.. It has not mentioned in any of the answer, not even in Urs's answer.. So, I thought of making a CW answer.. Is that fine or should I leave it as it is? $\endgroup$ Jun 2, 2020 at 15:48
  • $\begingroup$ Sure, this seems to be a good complementary answer then. $\endgroup$
    – YCor
    Jun 2, 2020 at 17:20

1 Answer 1


It's perfectly okay to do this, Praphulla. Usually that would be seen as a service to the community.


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