Note 1687 — Chapter LVIII

John’s third, fourth and fifth conditions do not exactly correspond to any of Peter’s, but are contained in the following quotation from Galen (simpl. med. I, 2) in the Concordances. “Ad hoc ut res recte experiatur, tria requiruntur: 1m est ut experiatur in re ad quam comparatur, ut helleborus in coturnice non in homine; 2m requiritur ut distinguamus inter opus quod facit res per se et quod facit per accidens; 3m oportet cavere ne complexio actualis obnubilet potentialem et de omnibus his exempla ponit.”