As Tufte sees it, graphic design has become a tragic field, a rich and storied craft knowledge that has been taken out of the realm of “nonfiction,” as he calls it, and into that of “fiction,” or marketing and propaganda. He told me several times of his contempt for “commercial art,” the graphic design that is “part of a fashion and a style and will be different someday.” Most designers, he said, want to do something new each time. “But I’m interested in the solved problem,” he said. “I’m interested in high art and real science.”