John Rockwell, writing in the New York Times, says that "for centuries new art has offended, challenging the purely pleasurable" and also that "in the end all art must seek to disturb and provoke" and ends with "great art is always shocking."

So because Seward Johnson takes Impressionist paintings and makes sculptures from them, his work is crap. But when the Chapman Brothers take Goya's war etchings and make sculptures out of them, their work may be great - because it's shocking.

I initially thought that they were both crap, but now I get it.