He also targeted middlebrow entertainment, deflating its pretensions. Although "middlebrow" often has connoted contempt, Lynes lauded the zeal and aspirations of the middlebrows. Rockwell is considered the "quintessential middlebrow American artist" by Michael Kelly. Pauline Kael was unconvinced by the film, and its "middlebrow highmindedness", but praised Williams. Ulman is particularly interested in middlebrow aesthetics. It's a middlebrow, painfully earnest, overwritten exercise in pop sociology. Penguin aimed at an educated middle class "middlebrow" audience. Some argue that "Slate" itself is middlebrow journalism. Lynes continued distinguishing among "brows", dividing middlebrow into upper-middlebrow and lower-middlebrow. "Slate" also defines the films of Aaron Sorkin as middlebrow.