The book deals with the formal analysis of Aristotles non-modal syllogistic; with the inter-relations between various syllogistic systems, their sub-systems and extensions; and with the fundamental question of the nature of the syllogism.It aims to effect a synthesis of recent work (both logical and philological) on the non-modal sections of the Analytics, within the framework of a new formal system which combines features of Lukasiewicz's "axiomatic" approach with features of the ,natural deduc ...