 Concerning the more prominent sort of change, namely, accident-replacement, two further questions were debated: one, “Does change form a single kind or not?” and two, “Where does locomotion occur, that is to say, do the initial atoms prior to the motion or the subsequent atoms after the motion receive the accident of motion?” One argument used to show that there are several kinds of motion observed that a single kind cannot bring about contradictory things, as for example, a fire does not produce cooling and heating; however, motions do bring about contraries such as being to the right or being to the left or being black and being white. Thus motion cannot form a single kind. An interesting response to this line of thought, which itself constituted an argument that motion forms a single kind, was the following. When a person determines to move, say to the right, then at the next moment there is both a motion and together with the motion a state of being to the right, and so there is a rightward motion. Similarly, should one choose to move to the left, there would be both a motion together with a state of being to the left, and so a leftward motion. Motion then can be analyzed into both a motion and a particular state or manner of being that accompanies the motion (where perhaps the accompanying state is understood as the result of the motion, although it is not explicitly described as such). The motion considered in itself is different from both the accompanying state (or result) as well as the composite of the state and motion. Motions considered in themselves, then, are similar with respect to being motion, but differ with respect to the state or manner of being that accompanies the motions, and so motion considered apart from the accompanying state is a single kind.