Warren, however, thinks that "human being" is used in different senses in (1) and (2). In (1), "human being" is used in a moral sense to mean a "person", a "full-fledged member of the moral community". In (2), "human being" means "biological human". That the embryo is a biologically human organism or animal is uncontroversial, Warren holds. But it does not follow that the embryo is a person, and it is persons that have rights, such as the right to life.