  As a result of his attempt to respond to external world skepticism in this way, Putnam has had an important influence in reviving interest in the possibility of using transcendental arguments against skepticism. (For further discussion of Putnam’s position, see Brueckner 1986, Coppock 1987, Heil 1987, David 1991, Brueckner 1992, Caranti 2007: 110–13.)