Unfortunately the post I have in mind has been edited to the point where it wouldn't make sense, but take this situation:
A question is asked of the style "I'm having a problem with this code, this is the error I get" with a code sample.
An answer is posted of "there's nothing wrong with this particular code sample you posted, you should look elsewhere if you're having problems" with a new included code sample demonstrating the fact that there's nothing wrong with it.
Is this an acceptable answer, or is this something that should be just a comment?