Critic: An art historian argues that because fifteenth- century European paintings were generally more planimetric (that is, two-dimensional with no attempt at suggesting depth) than were sixteenth-century paintings, fifteenth-century painters had a greater mastery of painting than did sixteenth-century painters  However, this conclusion is wrong
Fifteenth-century European painters did not have a greater mastery of painting, for the degree to which a painting is planimetric is irrelevant to the painter' s mastery
bases its conclusion on two claims that contradict each other