When voting to delete an answer from review, the following reasons/comments are provided:
I often come across answers in the review queue that simply reiterate information that is already present in other, usually more extensive answers.
I assume this mostly happens because (new) users don't read through the existing posts.
Would it be possible to have a 'duplicate answer' option, something along the lines of the following:
This answer duplicates information already present in an existing answer.
"This answer doesn't add any new information to the existing answers. Please read the other answers before posting yours to see if the information you are about to provide isn't already present, or upvote the answers that include said information."