 What is responsible for the possibility of indeterminacy, however, is the role of the principle of charity in formulating a theory of another person’s behavior (Davidson 1970, 222–23). And this principle is closely aligned for Davidson with mental anomalism. According to this principle, we must “try for a theory that finds him consistent, a believer of truths, and a lover of the good (all by our own lights, it goes without saying)” (Davidson 1970, 222). In the process of coming to understand another, by ascribing mental states and events to him and meanings to his words, we must, Davidson claims, stand ready to adjust previous assignments of meanings and mental states and events based upon new evidence about the person and how it relates to the overall project of finding him and his behavior intelligible. There are two key points here that for Davidson suggest mental anomalism. First, we never have all possible evidence—we must maintain an openness to better interpretations of previous behavior as new evidence becomes available. Interpretation is always ongoing. And second, ‘better’ interpretations are those made in light of the constitutive ideal of rationality. Consequently, Davidson claims, 