 Conscientious objection may be defined as a refusal to conform to some rule, mandate, or legal directive on grounds of personal opposition to it. Examples include conscripts refusing to serve in the army; public officials refusing to issue same-sex marriage licenses; and parents refusing to vaccinate their children as mandated by state law. Public officials’ conscientious objection is indistinguishable from rule departures insofar as the agent refuses to discharge the set of duties associated with her official role. Conscientious objectors’ non-conformity may stem from very different kinds of motives: the conscript’s religious pacifism or moral and political opposition to a particular war or military occupation, for instance, has little in common with anti-vaxxers’ pseudo-scientific beliefs. But, in many views, conscientious objection is conscientious in the sense identified above, that is to say, sincere, serious, and reflecting the depth of the person’s conviction. In other views, however, when an objector seeks to keep her act private and to avoid detection, this casts doubt on her sincerity and seriousness (Brownlee 2012, ch. 1). As an objection, conscientious objection also shares with civil disobedience the agent’s opposition to the law, since the conscientious objector refuses to conform with the law because she considers it bad or wrong, totally or in part, and thus seeks to disassociate herself from it.