 In his minor work, the Tractatus alphabeticus, Wodeham takes up the question of qualitative change and offers a position that is consistent with his overall opposition to atomism (cf. Wood 1990). According to Sylla, there were three dominant views of qualitative change that shaped the context of the discussion: the succession theory, the addition theory, and the admixture theory (Sylla 1973, 230–232). The succession and addition theory distinguish themselves from the admixture theory in that they are both committed to the fact that qualitative forms themselves do not change in degree. Rather it is the subject that changes in degree through the acquisition of a new qualitative form (cf. Sylla 1973, 232; Wood 1990, 375). Wodeham, in relative concord with the views of Ockham and FitzRalph and against the Mertonian Campsall and his usual nemesis Walter Chatton, argues against the admixture theory. He claims that it is impossible for one and the same quality to be changed while retaining its identity. As Wood says: 