Going through the review queue I saw a late answer from a user that has 1 reputation. The answer should very much have been a comment, since it only pointed out a mistake the OP made in their derivation.
I was keen to flag the answer as
not an answer but then realised that the user could not comment since one can only comment once you have 15 reputation (I believe). I therefore just stayed with
No action needed.
Of course I had the option to just use
skip but then someone else would have had to make the decision which is perfectly fine, but I would like to know what to do in a situation like this for future reference.
I would like to think that this would be a problem that has come up in the past, but I have not been able to find any information on it. Any thoughts on how to handle a situation like this in the future?