My question is how to remove duplicate answers, I mean many users just copy the correct answer and post it as their own without even knowing what they have posted. So how can I remove these answers which are exact duplicates of old answers without any modification. For reference take this case- click here
There are so many available answers for this question but they have only one answer-flag for moderator attention.
I have flagged it and moderator found it useful, screenshot of it is as
Even one answer's code is also not correct because he removed ` from my code which made it full of error.
Now my question is if the moderator accepted these two flags then why aren't these duplicate answers removed?