“The current artistic culture, which is replete with references, borrowings and parody, has collided with a corporate and legal culture that is bent on protecting intellectual property. If Andy Warhol were working today, he would be facing litigation from Campbell’s soup, Church & Dwight (the makers of Brillo pads) and every corporation whose logo he appropriated. ‘Virtually all art builds on previous work, either overtly or covertly’.”