At this question (and a number of others with similar tags), a SE question has been answered elsewhere on a domain-specific non-SE Q&A site. Indeed, the same user acknowledges posting both places simultaneously (which is fine, for the record).
My question is what to do in this situation regarding answering. Is it best for:
- The OP to cut and paste this answer
- For someone else to do so
- To close the question
- Just leave it open and unanswered forever
My understanding is that the third option is bad, and that the fourth is what usually happens. I find the second distasteful because it is so obviously answered and it was asked at the same time, so gaining rep for that is weird, but the first might not feel appropriate to the OP. Any ideas?
To my mind, this is not a duplicate of closing your own question in general or answering questions answered elsewhere in general, because of the fact it was a different Q&A site and it was asked by the same person.