When using the review queue, I'd like to be able to upvote the question and/or answer that is the duplicate of the one being closed.
After reviewing the possible duplicate and finding that
- it is in fact a duplicate
- it is well written
- the accepted/upvoted answer is suitable
then it makes sense to also upvote these, passing along credit where credit is due and making them more likely to appear in future search results. The only way to do this currently is to open the duplicate in a new browser tab/window.