This is a portrait of Robert Rauschenberg

because we say it is...

Or more accurately* because the man who might well be called the foremost American artist of the last century, Robert Rauschenberg, died yesterday evening, age 82.  Here is a link to the NYT piece, while here is a link to a NYT slideshow of Rauschenberg and some of his work from a while ago...

-Bluecupboard

*  Or most accurately because of Rauschenberg's infamous 1961 Portrait of Iris Clert which you can see here...