No. Adding a note to their answer saying "THIS IS WRONG, SEE MY ANSWER BELOW" would be a form of vandalism.
The correct procedure is to add a comment explaining why the answer is wrong. The answer will then be (gradually) outvoted by your correct answer. It might take years but them's is the downside of a vote-based system.
You might also want to address a ...
The user who asked the question should be encouraged to accept the correct answer
If the user who asked the question accepts the correct answer then no notice on your incorrect answer is necessary. A moderator has already encouraged the asker to accept the correct answer in this case. Other users have done so as well.
However, the asker may still choose to ...
Commenting and voting are the tools we have for “correcting” the balance if an answer is incorrect. Inserting chunks of text into other people’s post because you don’t like their answer is an abuse of editing privileges, as well as being just plain rude. Is it unfortunate that an answer is “incorrect”? Perhaps, but not enough to justify vandalising ...
Consensus on meta.stackexchange.com seems to indicate that yes, you can use bounties to draw attention to your own answers.
There was concern about this being used as a way to game the system, by gambling reputation in the hopes of earning enough upvotes on a late answer to make a net gain, but this has been addressed by setting increasing minimum bounties
In my opinion a new question should be asked, with a correct answer, and the Old question, with the Incorrect answer should be tagged as the dupe of the NEW question.
this seems to have been done before https://scifi.meta.stackexchange.com/a/6601/29220
as alex says
Just because two questions are duplicates doesn't mean we have to close the new question ...
I agree with Alexwlchan and Richard. The nice thing to do, the thing that would most encourage community building, in my opinion, is to either try and salvage the answer in the most minimalist way possible, or to work with the answering party on correcting his/her errors until he/she has a quality answer. It's okay to not always be in a competitive role -- ...
Per my answer to a similar question,
The correct procedure is to add a comment explaining why the answer is
wrong. The answer will then be (gradually) outvoted by your correct
answer. It might take years but them's is the downside of a vote-based
You might also want to address a note to the poster explaining why their answer is wrong ...
I haven't gone through all the meta.SE questions about wrong answers, but there's a clear pattern to the answers:
wrong answers are allowed to stay
downvote and/or comment them
they shouldn't be flagged for moderator attention
possibly edit it, but not just to say "this is wrong"
editing to point out something dangerous in an answer is usually ok (don't ...
Meta is for discussing the site itself, and for clarifying the rules. Certainly this sometimes entails discussing specific questions or answers, but ideally the goal should be that the specific examples are merely there to provide specific, practical illustrations of the policies of the whole site.
This suggestion feels a bit too much like "let's use meta ...