If you have it and you know you have it, then you have it. If you have it and don't know you have it, you don't have it. If you don't have it but you think you have it, then you have it.
But I don't really care for directors flaring up and trying to humble some actor, which they would do to try and make an example out of them so everybody else would stay on the ball - and David wasn't anything like that.