A user posts an answer that is wrong content-wise, meaning that it does not fit under any of the flags. Now, it has received a huge amount of downvotes. Can the user just delete it and add a new, exactly-the-same answer?
He could - though it would likely still get a lot of downvotes if he didn't fix anything. If he made a habit of it - he'd probably be answer banned, so he couldn't post any more answers easily.
Reposting, as such, solves nothing for the user, and its more or less resolves itself eventually