The most thing of theory mistake to post-modernism is to reverse the connection of phenomenon and essence, so it makes time and permutes the essence of literature. This essence is human nature and aesthetics. The traditional literature accents that literature is human knowledge, art is human nature, art uses image thought. But post-modernism says that tongue is image, art is technology, and image turns into the ability to roots predicate. So, they overthrow the essence of literature.
They disdain the essence of literature for human nature or literature aesthetics, and they wallow philological phenomenon and philological textual research. So, these theories lose literature auspice and instruction. They make literature theory to be a philological game. This is good for us to rhetorical question.