A major problem in contemporary analytic philosophy of art is whether and how it is possible to define art. The paper analyzes George Dickie’s institutional definition of art. His response to anti-essentialists’ arguments which deny the possibility to define art is presented. It is argued that Dickie attempts to substantiate his definition of art by invoking extensional methodology on the basis of which he construes the criteria for distinguishing between art and non-art as externalistic semantic, externalistic epistemic, and value-neutral. It is asserted that the institutional definition of art formulated by Dickie cannot be considered a definition of art as it is sustained by a logically vicious circle. Hence the conclusion that Dickie do...