Sometimes it is not practical to answer an Ask an Expert question with a Guru card. In those cases it would be ideal to still be able to mark the question as answered.
I realize that a question can be dismissed at any time, but it may linger as “unanswered” in other Experts’ inboxes making it seem as if it has not been addressed.
Archiving is not a solution since that renders the card inaccessible to everyone including the asker.