In analytic aesthetics the discussion on the classification and evaluation of the term "art" was and still is alive. The article briefly introduces this tradition (analytic aesthetic framework), which has its roots in the reception of Wittgenstein's Philosophical Investigations and includes authors such as Moris Weitz and Frank Sibley. The later reflection of the first themes and approaches, also called meta-aesthetics, is a parallel project to other disciplines of post-analytical philosophy, e.g. meta-ethics. Further, the study examines Joseph Kosuth´s conceptualism which serves as an example of the challenges faced by the philosophy of art in the 60s and 70s of the twentieth century. The particular aim of the study is a closer analysis of the dispute between classifying and evaluating of the term "art". Here the key part is played by the contribution of the Israeli philosopher Eddy Zemach. His approach is considered to be a functionalist solution to the problem of defining art. This solution implies the impossibility of neither temporal nor logical separation of classification and evaluation.