Being new here I've answered a few questions before they've been marked as duplicate. However, on checking the original answer, on a couple of occasions I believe my answer was still appropriate and not duplicated by one of the answers on the original question. I've also seen a couple of other questions that have been marked as duplicate but I don't think the answers were complete.
Is there, or should there be a way to move an answer on the duplicated question over to the canonical answer, or should the answer be answered again on the canonical answer?