What is the sense of the question “What is art?” It may seem that the only adequate answer will be the effort to define the notion of art, that is, the exclusive purpose of this question is the classification of art, encompassing all artifacts regarded as works of art and distinguishing them from those do not belong to art. The study points to the connection between our classification of artifacts and our evaluation and understanding of them. It also recalls reflections on the subject “What is Art?”, which does not even attempt to define it. Their aim is different: to change our understanding, evaluation or explication of art.