Cultural studies professor Andrew Goodwin writes that "given the confusion of the terms, the identification of postmodern texts has ranged across an extraordinarily divergent, and incoherent profusion of textual instances ... Secondly, there are debates within popular music about pastiche and authenticity. 'Modernism' means something quite different within each of these two fields ... This confusion is obvious in an early formative attempt to understand rock music in postmodern terms". Goodwin argues that instances of modernism in popular music are generally not cited because "it "undermines" the postmodern thesis of cultural fusion, in its explicit effort to preserve a bourgeois notion of Art in opposition to mainstream, 'commercial' rock and pop".