We often see situations where answers incorporate parts of other answers trying to create complete answers. Here is an extreme example where 2 answers each contain half of the information, and both thank the other answer for the other half: What is the lowest CR creature that has Legendary Actions?
Personally I think it is a good thing that both users were able to submit a contribution, and the overall answers are both stronger for it. In my experience collaboration almost always yields better answers.
However, I don't think it's desirable to encourage duplicate answers, and with the focus on this site on "complete answers" and SE's focus on rep gathering, I don't see a clear way to improve the situation.
In cases like these, which of the following is best practice?
- Leave the essentially duplicate answers
- Merge one into another
- Split them into 2 partial answers
- Some other suggestion