 Taking substance and quality as the only two absolute things (res absolutae), Kilvington concludes that the reality of motion is limited to what is in motion: the places, qualities, and quantities that are successively acquired. Consequently, he is more interested in measuring local motion in terms of the actions of the causes of motion, the distance traversed, and the time elapsed, than in the intensity of speed. In his questions on physics, Kilvington describes the differences between various types of change, such as generation, alteration, and augmentation; determines the measurements of active and passive capacities that cause change; finds rules for the division of various types of continua; and formulates a mathematically consistent rule of local motion. He examines the problem of motion from two points of view: with regard to its causes and with regard to its effects (see Jung-Palczewska 2002b).