Post-modernist thinkers hold the view that there cannot be objective knowledge of social issues. For the post-modernist, knowledge is not simply a cognitive factor; knowledge is also normative and political. Power and knowledge are mutually supportive and they directly imply one another. The post-modernists are critical of classical liberals as well as contemporary positivists who believed in objectivity and the superiority of science. Through deconstruction, the post-modernists want to look at every accepted or settled idea with new lenses.