I'm surprised to not see another post for this. Sometimes a user will post one question and never respond to anything. An answer is posted that appears to be correct. A year goes by. The post is still "unanswered". Should we flag them with a note to "mark answered"? Or...?
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Related, Related – Rob Hruska Jul 12 '11 at 13:17
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This has come up before - see meta.stackexchange.com/questions/81887/… – ChrisF♦ Jul 12 '11 at 13:18
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@Rob - Sorry, usual kind of search error - I searched "unanswered", assumed everyone would use that word. – Ed Staub Jul 12 '11 at 13:21
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@Ed - No need to apologize, I wasn't accusing. Was just providing more data. They may not be "exact" duplicates, anyway. Just related. – Rob Hruska Jul 12 '11 at 13:22
You ask:
Should we flag them with a note to "mark answered"?
No; don't do that. Nobody except the OP can accept an answer by proxy. Not even ♦ moderators. All you will do is create noise for the moderators to ignore.
If the answer is good, upvote the answer. That will make it clear that it has a sensible answer.