should be predicated, and whatever things possess genus, or are paronymously denominated from genus, have necessarily a certain species, or are paronymously demonstrated from some species, as if science is predicated of some certain thing, grammar also, or music, or some other science, will be predicated (of it); and if any one has science, or is paronymously denominated from science, he will also possess grammar, or music, or some other science, or will be paronymously called from some one of them, as, for instance, a grammarian or musician;—if then anything should be laid down which is in any way denominated from genus, as that the soul is moved, we must consider whether it is possible for the soul to be moved according to any species of motion, as to be increased, or corrupted, or generated, or such other species of motion. For if by none (may it be moved), it is evident that it is not moved: this place also pertains in common to both subversion and confirmation, for if it is moved according to any species, it is evident that it is moved, and if according to no species, it is evidently not moved.
He however who is not well provided with arguments about the thesis, must consider from the definitions, either real or apparent, of the proposed thing, and if he cannot from one, (definition,
