I flagged an "answer" in this question as not being an answer. It seemed clear to me when I flagged the answer as not an answer, that the OP who didn't have an account was answering a question given in the comments. But my flag was declined because "flags should not be used to indicate technical inaccuracies, or an altogether wrong answer". In cases like this should I flag it with other and include more of an explanation as to what I think is wrong rather than just flagging as not an answer?
I don't know who declined your flag. I converted the answer to a comment and merged the accounts. In general I think it's good to flag with more detail rather than less.