Postmodernism is an intellectual stance or mode of discourse characterized by skepticism toward the "grand narratives" of modernism, opposition to epistemic certainty or stability of meaning, and emphasis on ideology as a means of maintaining political power. Claims to objective fact are dismissed as naïve realism, with attention drawn to the conditional nature of knowledge claims within particular historical, political, and cultural discourses. The postmodern outlook is characterized by self-referentiality, epistemological relativism, moral relativism, pluralism, irony, irreverence, and eclecticism; it rejects the "universal validity" of binary oppositions, stable identity, hierarchy, and categorization.