I recently came across an "answer" to a question which didn't actually answer it. The question is genuinely difficult, and the "answer" merely got rid of a large number of counter-examples, and so was really a comment not an answer. Also, the "answer" was posted within an hour of the question being posed.
I subsequently have two (related) questions.
Should an answer posted so soon after the posing actually answer the question?
I believe that they should. Otherwise, the answer leaves the "unanswered" queue, even although it does not actually have an answer. The leaving of this queue is less of an issue of a question has gone unanswered for a long time.
If so, what should be done about those answers which only provide partial answers?
I flagged the answer I mentioned about as "not an answer", but my flag was "disputed". Should I dispute this dispute? Or is the community sympathetic to quick-fire partial answers? I know that I could simply re-post the question and link back to the original, but them my question would simply be a re-posting of the original but saying "I actually want an answer, not a partial answer!". Which is silly! (Note: I don't actually want to discuss this specific answer, I am just using it as motivation and as a handy example.)