So my objection to the Duchamp urinal as art is that someone else made that urinal. I absolutely believe that a urinal can be art, but if so, it is not art made by the person whose name is on the little tag in this case. And it's pretty clear to me that what he was trying to do was comment on who gets to deem things art or not, not say "haha it's just a pissoir!"--but I think that's undermined by the fact that he doesn't credit the actual creator.

But this just goes back to "club to beat art Heinlein [or whoever] doesn't like with": I think it's much more the case that this is not a congenial story than that it is not a story.