 According to Wheen, postmodern scholars tend to critique unfair power structures in the west including issues of race, class, patriarchy, the effect of radical capitalism and political oppression.Where he finds fault in these tropes is when the theories go beyond evidence-based critical thinking and use vague terminology to support obscurantist theories.An example is Luce Irigaray's assertion, cited by Alan Sokal and Jean Bricmont in their book "Fashionable Nonsense",