 Ethicists who are concerned that their theories not allow for moral dilemmas have more than consistency in mind. What is troubling is that theories that allow for dilemmas fail to be uniquely action-guiding. A theory is appropriately action-guiding if it assesses an agent’s options as either forbidden, (merely) permissible, or obligatory (or, possibly, supererogatory). If more than one action is right, then the agent’s obligation is to do any one of the right acts. A theory can fail to be uniquely action-guiding in either of two ways: by recommending incompatible actions in a situation or by not recommending any action at all. Theories that generate genuine moral dilemmas fail to be uniquely action-guiding in the former way. Theories that have no way, even in principle, of determining what an agent should do in a particular situation have what Thomas E. Hill, Jr. calls “gaps” (Hill 1996, 179–183); they fail to be action-guiding in the latter way. Since one of the main points of moral theories is to provide agents with guidance, that suggests that it is desirable for theories to eliminate dilemmas and gaps, at least if doing so is possible.