Fluffy, on 2012-September-18, 08:47, said:
You could try, but conceding was very hard, declarer said that he had conceded and there is no way she would take that trick back, with a disagreement for a score there is no solution other than calling director.
You could try, "O.K., then." and move on to the next deal. Declarer is in-effect saying she would have played the heart queen or jack, however lame that would be.