To clarify, this is not a question about summarizing or plagiarizing, or on answers that repeat comments. Three of us responded to Word for "parents with children who have moved out"? ; I think Mitch's comment and coleopterist's and my answers were posted all within about 30 seconds, and I don't think any of us were aware of the others.
My answer was the last to be posted by 5-10 seconds, and if it were a total duplicate I'd simply delete it. In this case, however, I think my answer is more complete and links to a more reliable reference; regardless of voting/accepting, I would want that information to be included somewhere in the thread. What is the accepted etiquette?
- Keep the answer and move on
- Delete the answer and add the additional information as a comment on the accepted answer
- Delete the answer and add the additional information by editing the accepted answer