There's been a recent spike in flagging as 'not an answer'. In most cases the answers are either inaccurate, not very good, or just plain wrong. Since they don't add much, it can feel reasonable to try and get them eradicated by mod-hammer.
These flags are being made in good faith, by conscientious members of the community, and we (moderators) are grateful for the many moderation situations that are correctly pointed out every day.
However, moderators commonly reject these flags. Why?