The vast compendium of logical works opens by delineating the very nature and office of logic itself, asserting it not as a substantive part of philosophy, but rather as an indispensable instrument, a tool of inquiry serving all other arts and sciences. It is presented as a rational discipline, born from the practice of philosophizing, yet distinct in its function, furnishing the means to investigate and order knowledge effectively.
A foundational distinction is drawn between the eternal realm of nature and the contingent sphere of human endeavor. From this bifurcation arise two corresponding forms of knowledge and, consequently, two distinct methodologies for their apprehension. The sciences, it is explained, concern themselves with the immutable truths of the natural world, operating as contemplative disciplines. The arts, conversely, pertain to the mutable, human-made world, acting as productive and non-contemplative pursuits. This careful classification establishes the intellectual landscape upon which all subsequent logical discourse is built.
Central to the pursuit of knowledge are the concepts of order and method. Order is described as an intellectual habit, guiding the proper arrangement of a discipline's components to facilitate easier learning. Method, however, is reserved for the discovery of knowledge, a more precise and active engagement. Two primary methods are expounded: the demonstrative or compositive method, which proceeds from cause to effect, and the resolutive method, which moves from observed effects back to their underlying causes. These syllogistic forms are the very sinews of rational inquiry.
Within this framework, a specialized form of demonstration, known as "regressus," is introduced and meticulously analyzed. This ingenious technique is designed to unite the compositive and resolutive methods, allowing for a dynamic interplay where cause and effect reciprocate. Through regressus, one can simultaneously uncover new causal relations and establish conclusions with absolute necessity, thus pushing the boundaries of scientific understanding. The profound implications of this method for discovering principles are exemplified in the study of natural philosophy, particularly within Aristotle's own works.
Throughout these logical treatises, a steadfast adherence to Aristotelian thought is evident, yet it is an allegiance tempered by rigorous examination and critical engagement. The arguments draw upon a rich tapestry of philosophical predecessors, from the ancient Greek commentators such as Alexander of Aphrodisias and Averroes, to medieval luminaries like Thomas Aquinas. The discourse often takes a scholastic form, meticulously examining and resolving a sequence of issues, always striving to elucidate the authentic meaning of Aristotle's texts while also appealing to experience as a validating force.
The overarching aim is to construct a coherent and systematic body of Aristotelian logic, clarifying doctrines and refining the instruments of intellectual inquiry. The work delves into the intricacies of defining substances and demonstrating accidents, asserting that true knowledge of substances comes through definition, not through mere "methods." The perfection of natural science is discussed, positing that while Aristotle's structure and form might be flawless, the subject matter itself is susceptible to further elaboration and understanding.
