  As regards these methods of presentation, Zabarella denies Galen’s view that these are four in number. Zabarella himself recognizes only two orders, the compositive and the resolutive. The order starts with what is either necessary or useful for teaching and learning. In the contemplative (or theoretical) sciences, which aim at perfect knowledge, order of presentation follows the so-called way of composition (compositio) from general principles to particular beings; in moral philosophy and in the arts, which aim at action or production, order follows the so-called way of resolution (resolutio) from the desired end to its first principles.