Raul Corazzon

"The role of logic in the Middle Ages. Regarding the role of logic within the framework of arts and sciences during the Middle Ages, we have to distinguish two related aspects, one institutional and the other scientific. As to the first aspect, we have to remember that the medieval educational system was based on the seven liberal arts, which were divided into the trivium, i.e., three arts of language, and the quadrivium, i.e., four mathematical arts. The so-called trivial arts were grammar, rhetoric, and logic, and during a period of several centuries virtually every educated person, at least every university graduate, received a training in these matters, especially in logic. Students in the medieval faculty of arts probably spent more time studying logic than any other discipline. This first -- institutional -- aspect concerning the role of logic is explained by the second -- scientific -- aspect. The trivial disciplines provided techniques of analysis and a technical vocabulary that permeate philosophical, scientific and theological writings. Logic, as mentioned before, was referred to and was generally regarded as the art of arts and the science of sciences. The increasing cultural dominance of the universities with their obligatory disputationes and their hierarchy of examinations on the one hand and the outstanding status of logic on the other were corresponding features of the educational world of the 13th century. The core of the logic curriculum from the 12th century onwards was provided by the logical works of Aristotle. These represented the material for the study of types of predication, the analysis of simple propositions or statements (2) and their relations of inference and equivalence, the analysis of modal propositions, of the structure and the types of the syllogism, dialectical topics, fallacies and scientific reasoning as based on the demonstrative syllogism. Medieval logicians, however, realized that there were other, non-Aristotelian, approaches to logical subjects, questions and methods that could be investigated..

"Nowadays, a need for formal tools is strongly felt in the treatment of two special areas of ontological inquiry. One area is concerned with intentional objects, an area which seems to contain difficulties on the level of things, but also on the level of states of affairs, facts and other "propositional" entities. An intentional relation holds between either persons (more generally experiencing subjects) or acts of consciousness on the one hand, and the intentional objects on the other. The latter are what people see, fear, expect, look for; and the problem, naturally, consists in the fact that – contrary to..

"The difficulty of piercing the screen, sometimes very opaque, which is the Aristotelianism of so many centuries, based substantially on the thinking of a thousand and one more or less faithful "disciples," is doubled by a difficulty probably unique in its kind: the impossibility of always being able to determine exactly the sort of things the writings of the authentic Aristotelian Corpus are. For we suspect that scholars often have to deal with texts whose definitive form owes something to the work of Aristotle's disciples. We remain, on the other hand, powerless to determine always with precision the extent to which the products of their work continue to conform to the master's thinking or proceed, on the contrary, from a new idea. At least I can state very generally that the organization of the Corpus Aristotelicum, such as scholars after Andronicus of Rhodes have understood it, depends for them on the firmer and firmer conviction that Aristotle elaborated a philosophical system whose constituent parts are reflected in the arrangement of the different preserved treatises, as if their author had effectively "programmed" them from the perspective of systematic expression. Now, this is the one intention that we may hardly attribute to our philosopher. The project of expounding a genuine system is in fact, as I. During has written,(4) "typically Hellenistic but very un- Aristotelian." Such a claim will perhaps seem today the unavoidable result of Jaeger's explicit attempt to combat "scholastic idolatry,"(5) which regarded the work of the "master of those who know" as a genuine "summa," firmly articulated. But, independently of Jaeger, K. Praechter, for example, assures us that "a secure division of the philosophical disciplines according to a determinate principle does not occur in Aristotle"! (6) And it is obvious that Aristotle was not as concerned as his disciples were to propose a rigid system of sciences and to organize his writings systematically according to it. This indeterminateness is obviously quite irksome for the interpreter who asks about the occasion for the project of Aristotle to which the texts catalogued under the titles Ethics and Politics correspond, and who finds himself dealing with a Corpus established by people who indeed thought that they could abolish such indeterminateness by recourse to the hypothesis that the philosopher conceived his project as formally expounding a genuine system. Moreover -- and this is a prime consideration whose significance I shall examine at great length -- the originality of Aristotle's project risks being masked by the interpretation or the importance given since antiquity to certain interpretive categories (human philosophy, practical science, ethics, etc.) in accounting for the approach of a series of texts integrated in the Corpus, itself conceived as a philosophical summa..

"Philosophy meant Greek. Rome had nothing to offer except a stern traditional moralism exemplified by Cato, which found the rigid Semitic ethic of the Stoics congenial, and a reaction away from this, which expressed itself in a loose Epicureanism, such as Epicurus himself and his sincere exponents would have utterly disowned. 'And so it is not Epicurus who has driven them to debauchery. They have already given themselves over to immorality, and now try to hide their debauchery in the lap of philosophy; they congregate in the place where they hope to hear the praise of pleasure' (1). The words date from the next century, but they are applicable to the age of Cicero. Cicero is at some pains to explain away the apparent Roman incapacity for philosophy. He suggests that there is no real inability : rather their energies have been diverted into other channels. Be that as it may, philosophy meant Greek, and Greek philosophy of the age of Cicero was represented predominantly by four schools

Stagirite's important disciples should also be mentioned. Other philosophers belonging to the Peripatetic school were: Aristoxenus, Dikaiarchos, Phanias, Straton, Duris, Chamaeleon, Lycon, Hieronymus, Ariston, Critolaus, Phormio, Sotion, Hermippus, Satyrus and others. Straton even succeeded Theophrastus as director of the Lyceum but his name and those of the other Peripatetics of Aristotle's old school should not be considered in a history of logic as they were mainly concerned with history and the natural sciences

L. M. de Rijk, born at Hilversum (Nederland) November, 6 1924, is Professor Emeritus of Ancient and Medieval Philosophy at the University of Leiden, and Honorary Professor at the University of Maastricht. A complete bibliography of his writings up to 1999 is available in: Maria Kardaun and Joke Spruyt (eds.) - The winged chariot. Collected essays on Plato and Platonism in honour of L. M. de Rijk - Leiden, Brill, 2000. pp. XV-XXVI. I made some corrections, updated the bibliography and omitted the publications in Dutch

"I reached the chair of philosophy via logic. Teaching logic became the field of my activity as a university professor of philosophy, a member of other humanistic faculties. Emphasis is here placed on the words 'teaching' and 'humanistic'. For my lectures and classes were conceived as an organon in the classical sense of the term, for philosophers as well as for those who, having completed their course of study, would espouse the cause of disseminating humanistic knowledge and thinking, particularly future secondary school teachers. Somewhat later my activity embraced also law students. My linguistic equipment proved to, be very helpful in this respect. For it seems especially important when the problems of an organon of this kind are..

Mental contents - Intentional contexts - The behavioristic approach 104; 5. Intentionality. Possible particulars - Possible states of affairs - The intentional nexus 144; 6. Realism. Direct and indirect knowledge - Perceptual and phenomenal objects - Delusive perceptual situations 180; Index 238-248. "This book avoids a number of traditional problems from the philosophy of mind. Emotions and volitions are hardly mentioned; and very little is said about imagination and memory. I am concerned in the main with only one topic: the realism-Idealism controversy. This concern explains why I limited the discussion to thought and perception. It also explains why at times I had to go rather deeply into the problems of general ontology; for if my analysis is correct, the realismidealism controversy arises from certain disagreements in general ontology. Nor does this book deal with a number of currently fashionable topics. I say nothing on whether or not mental states are after all nothing but brain states. I do not discuss this point because I am convinced that there is nothing to be discussed. The correct answer to the question seems to me so obvious that I simply took it for granted in writing this book. The problem of our knowledge of other minds is of quite a different sort: it is, philosophically speaking, interesting and difficult. Since I do not discuss the problem, I may mention here that I consider all solutions in terms of so-called criteria for the application of expressions unsatisfactory. The one fashionable topic which I do discuss, though not under a separate heading and not in the movement's jargon, is the so-called private language argument. I am sure that the attentive reader can construct my position on this matter from the first chapter." (from the Preface)

"Heidegger's way of understanding the originary phenomenon of truth is to "make clear the mode of being of the cognition itself." His starting point is a proposition that is not based on intuition. Someone says with his or her back to the wall: this picture hangs askew. The proposition embodies the claim to have discovered the picture (as a being) in the "how" (the mode) of its being. The proposition displays this "how" of being in language. In the attempt to verify the proposition by sensuous experience, the recognition, according to Heidegger, is directed only to the intended being (the picture) and not to the proposition. It is directed to the being itself (which is to be verified by perception) in its mode of uncoveredness (Entdeckt-heir), i.e., in its showing-itself. Confirmation (Bewährung) means this showing-itself of the being in the same way in which it is intended in the proposition. A true proposition shows the being in its mode of uncoveredness. The phenomenon of "originary truth" does not have the character of correspondence. It is the ground of the concept of truth in the sense of correspondence and propositional truth. By unfolding the meaning of alétheia Heidegger shows us a more originary sense of truth as unconcealment (Unverborgenheit). He wants to show that this concept coincides with the first and originary concept of truth in Greek thinking. In this primary sense only the discovering human Dasein can be "true" while it is Being-discovering (Entdeckend-Sein). On the other hand, beings (Seiendes) that we can find in the world can only "be" in a secondary mode, i.e., as being-discovered (Entdecktsein). They can only make a claim to uncoveredness. Their fundament is the Being-discovering of the human Dasein. The being-true of a discovered being is only possible as being discovered by human Dasein as being-in-the-world. The authentic Being of Dasein, the being-in-the truth, presupposes disclosedness (Erschlossenheit) of the world in states-of-mind (Befindlichkeiten), understanding, and discourse, i.e., the constitution of the being (Seinsverfassung) of human Dasein as thrownness (Geworfenheit) and project (Entwurf)..