I wonder how useful a question about art is? Who uses this word? How is the concept used? Is corporate art different from museum art? What does art mean in our everyday life? The word and concept of 'art' gets used in many different ways. I suspect that it is often used to connote some form of division between people, 'Is it Art, is it not Art?'. But maybe in our everyday life we can see art differently, not as an object, or commodity but as an activity .. like blogging?
Michael Craig-Martin, Mural, Regent's Place, Euston.