Recently I've been noting that I sometimes get invalid flags when I dispute that the answer on a question is not an answer.
As two examples these two answer https://security.stackexchange.com/a/48824/3339 and https://security.stackexchange.com/a/48817/3339
Are both valid answers. They might be wrong but they are answers. It was to my believe that the "not an answer" was only to be used when answers should in fact have been comments or when they are of extremely low quality e.g. (one sentence).
So what are the rules for flagging as "not an answer"?