Art Historian: Robbins cannot pass judgment on Stuart' s art. While Robbins understands the art of Stuart too well to dismiss it, she does not understand it well enough to praise it. The art historian's argument depends on the assumption that ['if art can be understood well, it should be either dismissed or praised', "in order to understand Stuart's art, Robbins must be able to pass judgment on it", "in order to pass judgment on Stuart's art, Robbins must be able either to dismiss it or to praise it", 'if Robbins understands art well, she will praise it']