Vagueness and para-literary extravagance in the Anglo-American art criticism. Art-writing in the second half of the twentieth century from a rhetorical strategy to an autonomous genre . The essay offers an analysis of the transformations that occurred due to the dynamic artistic debate in the United States in the second half of the 20th century, when art-writing and art criticism were constantly subject to redefinition with regard to an object - the artwork - which was gradually becoming undetermined. Retracing the evolution of the reflections on art criticism, the paper shows how it progressively tended towards a form of autonomous narrative taking the steps from art - employing vagueness as a genre rather than as a rhetorical means - such...