Mediator? Moral Expert? Or both? "Discourse Ethics" suggests that consensus provides the foundation for defensible moral norms. Thus in building consensus on a moral problem, an ethicist is not just negotiating a compromise but is contributing to the construction of moral rules and principles that have a genuine claim on us. In this way, not only does expertise on a variety of moral positions facilitate mediation, but mediation opens the way to a kind of moral expertise.