Postmodernism can be seen as a reaction against the ideas and values of modernism, as well as a description of the period that followed modernism's dominance in cultural theory and practice in the early and middle decades of the twentieth century. The term is associated with skepticism, irony and philosophical critiques of the concepts of universal truths and objective reality. Postmodern art questions the notion of authenticity and embraces 'hybridity’, blurring the lines between high art and popular culture. Postmodern photographers are particularly interested in the selective, constructed nature of the photograph. Artists like Cindy Sherman, Barbera Kruger, Edgar Degas and Pablo Picasso are well known post modernist artists.