A user asked a question on StackOverflow and indicated in a comment he found the answer. Two subsequent comments asking the user to provide the answer have gone ignored.
Is this the only way to react? Is it OK to downvote such a question? Or should there be other ways?
The user will also not see his accept rate suffer, as there are no other answers.
I'm interested in the answer, and wonder how I can get the user to provide it. Of course, there's always the possibility the user just isn't returning to StackOverflow.