We have an Enlightened badge:
First to answer and accepted with score of 10 or more. This badge can be awarded multiple times
But we don't have a badge to reward adding a good answer to a question that already has an accepted answer.
I know we have Populist, but that's not the same at all:
Highest scoring answer that outscored an accepted answer with score of more than 10 by more than 2x. This badge can be awarded multiple times.
You can earn this if you answered before the accepted answer was accepted or even written, and you don't earn this if the OP switches the accept to your answer before you double the high-scoring accepted answer. (And as I recently discovered, if you have a high-scoring answer and a new answer is added, then accepted while it still has a low score, you will get Populist even if that answer quickly ends up outscoring yours.)
So I suggest Undeterred:
- at the time of posting your answer, the question has an accepted answer
- at some point your newer answer become the accepted answer
- why not just more votes? Partly because then it's just a diluted Populist. And mostly because I want to reward a desire to help the OP more than a desire to show off. Both are important parts of SE, but we've all seen those "you're doing it wrong" answers that get a lot of upvotes. That's not what I want this badge to encourage.
- self-answers and self-accepts obviously excluded
- I don't see a need to require any minimum score for your answer or score differential from the originally-accepted answer, but am open to hearing thoughts on that
- Shadow Wizard worries that OPs sometimes accept hacky and darn-near-wrong answers because they happen to work, and that moving the tick from an early, well thought out, but difficult approach to a later ugly hack that is massively downvoted yet accepted would be bad. To prevent that, the suggestion is to require a minimum score of two for your answer (so at least one person other than OP upvoted or downvotes were outweighed by that much.) I can support that.
I think Silver?
The behaviour this encourages is
If I know a great answer to a question, I will provide it, even if there are other answers right now, and even if one of them is accepted. I'm confident that what I have to offer on this question is worthwhile.
(And as time goes by that confidence is proved correct when the tick moves.)