 The classification of the sciences, indeed, is not complete because the aforementioned arts are all theoretical and arts like medicine or agriculture have not been considered. Alfarabi distinguished, at the beginning of his Risala, between syllogistic and non-syllogistic arts and aligned medicine, agriculture, carpentry with the second. They were non-syllogistic because, once their parts were assembled they resulted in doing something, not in employing a syllogism (Dunlop 1957a: 225). He admitted, nevertheless, that some parts of these non-syllogistic arts were brought out by syllogisms, and he mentioned medicine, agriculture and navigation. Avempace was not as systematic as Alfarabi but he picked up the forgotten non-syllogistic arts, changed them into “practical arts”, and wrote: