[...] These two literary trends can be seen to represent the two senses in which the term postmodernism is most often employed: on the one hand, a theoretical postmodernism, signifying a predominantly 'academic' problematization and subversion of beliefs considered to be central to modernist thought or Western thought in general; and on the other hand, a popular postmodernism, referring to a broader societal situation, namely, the widely shared perception of reality as having become uncertain and devoid of value. [...]
Barth and Ellis, respectively