I accidentally downvoted a question (misclick, drank lots of coffee heh...) and then upvoted the same answer. I noticed I was award the critic badge for giving my first downvote.
Why is the critic badge awarded if you downvote by accident and then upvote the same answer?
Why is it wrong? You indeed cast a downvote.
Whether you revoke it later or not isn't relevant, it was indeed cast for at least a few minutes (that's how long the badge process takes to run).
I guess this is a badge that's not "wow a big accomplishment" but rather to encourage exploring the system. You did explore the system, even if unintentionally.– poolieSep 20, 2011 at 22:27