He argues that the other man’s philosophy would keep changing based on Clark’s readings as he got all his information from readings like Lemon and Vickers. Will’s argument is successful because he uses two rhetorical devices to make his point. His volume and tone throughout his speech are calm as he delivers the point, which appeals the logos because he uses logic and reason instead. He established his credibility by showing his vast knowledge of the success and indicating that some aspects are his original thoughts.