I'm new to reviewing and have been reading up an awful lot here on meta to find as much policy as I can, but I'm struggling to find a good response to this scenario:
User with not very high rep misunderstands the difference between editing and answering themselves, and posts what seems to be a different, but apparently helpful answer as an addition to an existing answer. I think this should be a separate answer to gain its own up (or down) votes as appropriate, but the only two options open to me are
reject (because of substantial change, correct response) or
accept (against policy, and reinforcing user's misconception).
Answers to Interesting edit make it clear that rejection is the best policy, but I'm always looking for good ways to both teach users and preserve potentially valuable content, and worry that neither happens when I do this.
editors target for @comment replies? makes it clear that my first idea for a workaround, (leaving info about how to find the rejected edit and suggesting they re-post it as an answer) wouldn't work.
The scenario I'm coming up against (works-as-answer) and related ones (works-as-comment) are discussed to some extent in suggested question edits that add answer, but the advice there also seems to lean towards reject & forget.
I can't recall having one of my own edits rejected (and couldn't find any in my history), so I don't know what all this will be like from their end.
Sometimes edits add valuable, informative content to the site but aren't really edits. Is there a way to allow a reviewer to convert it rather than rely on a less experienced SO user to make the change?
Please inform: Does the suggester get a notification with a link to the text I write in the custom reason, together with their proposed edit? (This solves the immediate problem if so.)
Please discuss: Would it be worth allowing a reviewer to move reviewed text from question edits/answer edits into new answers/new comments as appropriate, attributed to the suggester but marked as edited by the reviewer?