  For Zabarella method also serves to differentiate the sciences from the arts. The term can be understood in two ways, either in a wide sense as a method of presenting existing knowledge, which he prefers to call an order (ordo) of presentation, or in a narrow sense as a method of discovering knowledge, for which he reserves method (methodus) in its proper understanding. According to Zabarella, ordo is an instrumental habitus through which we are prepared so to dispose the parts of each discipline so that the discipline may be taught as well and easily as possible.