Hanfling 2000: 85???89).8 And if a philosopher denies something extremely obvious, such as the existence of middle-sized dry goods, the argument can be used indirectly by pointing out that the philosopher uses many concepts other than middle-sized dry goods" in a way that tacitly presupposes the dry goods??? existence (Hertzberg 1976: 42???46; Grice 1989: 172; Kitching 1994: 241???244; Hanfling 2