I recently flagged this answer (since deleted) to https://stackoverflow.com/q/22181012/1281433 as not an answer, since it appeared to be the question's poster attempting to add some context to the post, and to describe some attempts at a workaroud. I added a comment as well:
This isn't an answer to your question. This should be posted as an edit to the question, or as a new question entirely.
This seemed like an appropriate NAA flag, since
This was posted as an answer, but it does not attempt to answer the question. It should possibly be an edit, a comment, another question, or deleted altogether.
If this were posted by someone other than the OP, I could see that it might be an attempt to answer the question, but since the OP knows that it doesn't answer the question, it seems more like "It should possibly be an edit" on the question that describes existing attempts.
The flag was declined. I'm not too concerned about that, since it's just one out of many, although the new "some of your recent flags have been declined; please review them first" is a little scary. What I'm asking about here is the decline reason text:
flags should not be used to indicate technical inaccuracies, or an altogether wrong answer
This doesn't seem to recognize the context that it was the OP adding more information about the problem (and so should be an edit). I wasn't claiming that it was technically inaccurate or altogether wrong, but just that it would make more sense as an edit to the question or a new question entirely (since it's about a different approach).
All that said, I'm not so concerned about the declined flag; it's just one of many. What I'm curious about is whether the decline reason was manually entered, suggesting a miscommunication of intent, in which case I should write better comments in the future, or whether the decline reason is "canned text", in which case this was simply the closest, most appropriate text, even if it's not an exact fit.
Note that if it had been a user other than the owner of the post, this would seem like a genuine, if not quite complete, answer, but since it was the owner of the post, it seems that it's not