Postmodernists reject metanarratives because they reject the concept of truth that metanarratives presuppose. For postmodernists, the hermeneutic circle is especially problematic. Postmodernists, in contrast, reject Aristotelianism's claim to reveal important theoretical truths. Postmodernists such as Salman Rushdie and Italo Calvino commonly use Magic Realism in their work. Postmodernists also believe there are no objective moral values. Today, Ricardo is seen as one of the founding European Postmodernists. Postmodernists consider the Frankfurt school to be one of their precursors. Many of them are considered to be "postmodernists". These are not used by all postmodernists, nor is this an exclusive list of features. Postmodernists take another view, suggesting that what is right or wrong is dependent on circumstance.