In this paper, I will first criticize the role that the most popular version of the Principle of Charity accords to rationality, in relation to linguistic interpretation. I will then propose an alternative view based on Paul Grice\u2019s Cooperative Principle and his argumentative conception of rationality. According to the Principle of Charity, assuming that people are rational is a necessary condition of the possibility of interpreting their linguistic behaviour successfully. In this sense, we cannot understand other people\u2019s utterances without also ascribing a certain degree of rationality to them. Although this presumption seems to be strongly entrenched in our ordinary linguistic practices, I will argue that the Principle of Chari...