What should I do when I come upon a question that's missing some information, which has been requested...but only in an answer that does not actually attempt to answer the question, nor even to outline or even hint at how the information could lead to an answer? Should I repost it in summary (and in quotes or my own words) as a comment, in case it's deleted? Should I flag it for moderator attention? Should I do both? Neither? Something else?
This "answer" is what I have in mind (though who knows if it will still be there, and still fit this description, when you are reading this). But I find this happens frequently, and I've never been quite sure what to do.