Here's what Arthur C. Danto wrote about Andy Warhol's Brillo Boxes in his famous 'The Artworld' essay, in 1964:
"Never mind that the Brillo box may not be good, much less great art. The impressive thing is that it is art at all. But if it is, why are not the indiscernible Brillo boxes that are in the stockroom? Or has the whole distinction between art and reality broken down?"