A textobook on classical Aristotelian and Thomistic Logic, with some comparisons with modern authors. Topics: Conceptos, Universals, Predicables, Analogy, Proposition, Syllogism,Sophisms, Scientific Knowledge.

This book studies the notions of order and universe in the philosophy of Thomas Aquinas. It provides an overview of an array of metaphysical concepts in Aquinas such as relation, proportion, types of order, composition, whole and part. It is claimed that Aquinas' metaphysics is mainaly a metaphysics of the order of the universe.