During reviewing, I stumbled upon the following situation as e.g. in this thread.
The original question was asked, answered and accepted. Now somebody else posts an answer which actually is somewhat of a follow-up to the existing answer. Of course one could flag it as not being an answer and ask for a separate question (which is a fine option to have). On the other hand, the original question is refined through this answer. If the user, who posted the second question as answer, would edit the original question, it would be fine according to the site rules. Yet (if I understood it correctly), the original author would potentially be credited for a nice question, which was actually later created by somebody else.
Should there be a way to combine the two questions, so that all questions and answers show up on one page, with shared credits for both asking users? Somehow it sounds appealing to me as everything would be in one place rather than having another question on the same or a very similar topic, which probably just looks like a duplicate and would potentially need to be answered with a copy of the original answer.
What's best practice in such a situation as reviewer? Strictly flagging it as a non-answer? Suggesting an edit to the original question?