Scenario: a new question is posted of the type "Is it possible to...?". A user kindly points to a possible duplicate question, particularly old (+1 year) which has an accepted answer (also of +1 year) of the type "No it is not possible...". However one finds that the question does have an "It's possible..." answer now that time has passed.
What would be the proper thing to do:
- Flag the new question as duplicate so it gets closed and post valid new answer on old question?
- Post answer on new question and just leave old question/answer alone?
- Same as before but flag or do something on old question/answer?
- Something else?