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user 3.14159
Here is some standard situation that often occurs on SE sites. Imagine there is a question.

1. One standard situation is that user A answers it. In a way, A has done the "main work".
2. Now user B copies A's answer and adds some detail that makes the answer a bit more elegant, the result more pretty, whatever. Importantly, B's amendments are not crucial for the answer to work.

Whom are we going to upvote now. B's answer may well be the better answer, but would not have been possible with out A's work. One could now have (at least) two very different opinions:

1. All we care about is that the best answer is on top. Even though B's contribution may only be incremental, theirs is still the better answer. Other users will appreciate it if they see the (slightly) more elegant answer on the top.
2. We should not encourage the behavior of taking the main credit for something that one has not done. On the long run this will discourage expert users from contributing because someone else can always just add something minor and get the full credit.

This question is to ask whether or not there is something like a recommended behavior. In other words, I'd like to ask which of the two options (if any) looks more reasonable to the community. 

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