  That a number of different methods might be assimilated here is not  noted, although the text does go on to distinguish four main types of ‘issues concerning things’: seeking causes by their  effects, seeking effects by their causes, finding the whole from the  parts, and looking for another part from the whole and a given part  (ibid., 234). While the first two involve regressive  analysis and synthesis, the third and fourth involve decompositional  analysis and synthesis.