 Williams considers it an axiom of trinitarian theorizing that “the divine persons are necessarily unified or necessarily agree regarding all things” (2017, 321). Some rival theories try to account for this “necessary agreement thesis” by showing how, allegedly, the Persons would have to come up with some policy which would prevent disagreement. Williams finds such claims “philosophically unsatisfying”, and instead argues that the three Persons can never disagree because they have numerically one will, one power of choosing (322). Unlike any other three persons, the Persons of the Trinity, because they share one divine nature, share one set of powers, and so any exercise of any divine power belongs to each of the three. In this case, Williams analyzes thinking as producing and using a token sentence in what we might call divine mentalese. Building on work by philosopher John Perry on indexical terms like “I”, Williams points out that a single token of a sentence in English may be used by different agents, and may thus have multiple meanings. For example,