Chapter 68

One must know that there are four dialectical or logical methods. That is by division which divides the genus into species by means of the intermediate specific differences. That is by the definition which defines the subject by the genus and the specific differences divided out by the method of division. That is by analysis which resolves the more composite thing into its simpler elements. Thus, the body is resolved into the humors; the humors, into the fruits; the fruits into four elements; the elements, into matter and form. That is by demonstration which proves the matter at hand by means