An Idiot coup can also refer to a play that appears to present an alternative (losing) option to an opponent, but upon closer inspection could not possibly be the right one. For example, suppose declarer holds xx opposite KT in dummy. During the play of another suit LHO, who is holding AJx, discards the jack, knowing that he is only entitled to one trick in the suit in any case. Now when declarer leads the small card toward dummy and LHO follows low, he might think he has a "guess" in the suit, when in fact LHO would have no reason to discard the jack if he also had the queen. (That is, unless LHO is trying to Grosvenor him.)