Guest curator Valerie Hellstein had her work cut out for her with the exhibition Dialogue and Defiance. The exhibition tries to qualify Clyfford Still’s notorious “defiance” of the artworld by emphasizing the “dialogue” between him and his contemporaries—those who came to be called the Abstract Expressionists. Still, though, would no more have admitted to having been in dialogue with his peers than he would have wanted an art critic to review his paintings.