Imagine the following situation:
User X has a question. Being a frequent user of SE, he knows that he should always to do some research before asking his question, just in case his question has already been answered.
He finds a question similar to his own. However, he cannot use any of the answers mentioned, because they do not work/are not applicable to his situation/are sub-optimal/<insert other reason here>.
User X then goes and asks his question. In the question body, he specifically mentions what he has tried, and why it doesn't work or why he can't use it.
Example:
How to prevent unicorns from eating my daisies?
I love the unicorns who hang out behind my kitchen, but they do tend to eat rather a lot of the daisies. What can I do about this?
Note: I have already tried placing some corn nearby, as mentioned here, but they still choose my daisies over the corn. Strange.
Then a low-rep user comes along and posts an answer, telling the OP to... place a bucket of corn nearby.
You should try placing a bucket of corn beside the daisies. I have heard on the internet that daisies like corn.
- UnicornL0ver99, 1 rep
Should answers be flagged as NAA if the OP has already specifically stated that they do not want to use the answer's solution? Note that I am not talking about when the OP edits their question after the answer is posted - that is a different situation altogether.