The self-righteous person's superfluity of moral credit is the basis of his discourse. He presupposes his own moral values and his own righteousness as a condition of conversation. The effect of this is that anyone talking to a self-righteous person must either agree with his moral values and act equally self-righteous, or face being put in a morally inferior position in the discourse. This is what makes self-righteous people particularly infuriating to talk to. F