The Benhabib-Butler debate demonstrates that there is no simple definition of a postmodern theorist as the very definition of postmodernity itself is contested. Michel Foucault rejected the label of postmodernism explicitly in interviews yet is seen by many, such as Benhabib, as advocating a form of critique that is "postmodern" in that it breaks with utopian and transcendental "modern" critiques by calling universal norms of the Enlightenment into question. Giddens (1990) rejects this characterisation of "modern critique", pointing out that a critique of Enlightenment universals was central to philosophers of the modern period, most notably Nietzsche.