Aspects of ReasonReasons and reasoning were central to the work of Paul Grice, one of the most influential and admired philosophers of the late twentieth century. In the John Locke Lectures that Grice delivered in Oxford at the end of the 1970s, he set out his fundamental thoughts about these topics; Aspects of Reason is the long awaited publication of those lectures. They focus on an investigation of practical necessity, as Grice contends that practical necessities