O Que E Afinal O Pos-Modernismo?

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What is post-modernism? Is it a word-list, just another 'ism',or a concept still to be defined? What is the relationship between post-modernism and cultural theory? Where are we to find post-modernism within literature (or vice verse, you might argue)? Is this really the day after modernim? Should we stop asking what is postmodernism?