Art?....

The beginning of the chapter on Danto starts off with the phrase "was there anything that could not be art?". Now not only are we trying to define what is art, but we are also trying to determine the certain parameters there are. This chapter used Andy Warhol as an example a lot and I think that was an excellent example because his art work does look like something that one could see in everyday life. So how do you determine the difference between art and real objects then?