RésuméIl est bien connu que les notions detaṣawwur(conceptualisation) et detaṣdīq(assentiment) sont tout à fait centrales dans l’épistémologie de la philosophie arabo-islamique. La “conceptualisation” désigne la définition d'un objet de connaissance, et l’“assentiment” la reconnaissance de la véracité de la définition, par un raisonnement d'un certain type. Parmi les auteurs ayant traité ces deux thèmes le plus en profondeur figure al-Fārābī, qui a exercé sur Ibn Bājja une influence décisive. Cet article analyse les passages relatifs àtaṣawwurettaṣdīqdans les notes d'Ibn Bājja aux (...) écrits de logique et de méthodologie scientifique d'al-Fārābī, en particulier ses gloses auKitāb al-Burhān. On montre ainsi qu'Ibn Bājja a parfaitement saisi l'importance de ces deux termes dans la lecture farabienne de la méthode scientifique aristotélicienne, et qu'il les a employés pour traiter de certaines activités mentales. En effet ces deux notions, centrales chez Ibn Bājja, sont à la base de certaines de ses œuvres les plus fameuses. (shrink)

This study, limited to Kitl al-sa'āda, examines two points: the first point concerns the place of political science in the hierarchy of the sciences and its dependence on Metaphysics. This dependence gives it a theoretical status and a proper subject, namely voluntary intelligibles which appear as objective entities and stable essences. The second point to be examined concerns these intelligibles, considered in their relationship to deliberation. From this viewpoint, they appear as formal invariants open to different formulations which correspond to (...) different modes of existence. These formulations are also formal rules to the realisation of intelligibles, and though they are more or less general, they are not universal. They are objects for deliberative discovery and the model of deliberative operations seems similar to the model of ingeniosity present in Algebra and the arts of ingenious devices. (shrink)

Avicenna (d. 1037) and Tūsī (d. 1274) have different doctrines on the contradiction and conversion of the absolute proposition. Following Avicenna's presentation of the doctrine in Pointers and reminders, and comparing it with what is given in Tūsī's commentary, allow us to pinpoint a major reason why Avicenna and Tūsī have different treatments of the modal syllogistic. Further comparison shows that the syllogistic system Rescher described in his research on Arabic logic more nearly fits Tūsī than Avicenna. This in turn (...) has consequences for analysing Avicenna's logic, and for writing the history of a fascinating period of change and diversity in the discipline in the medieval Islamic world. (shrink)

This paper examines al-Fārābī's logical thought within its Arabico-Islamic historical background and attempts to conceptualize what this background contributes to his logic. After a brief exposition of al-Fārābī's main problems and goals, I shall attempt to reformulate the formal structure of Arabic linguistics (AL) in terms of the ontological and formal characteristics that Arabic logic is built upon. Having discussed the competence of al-Fārābī in the history of AL, I will further propose three interrelated theses about al-Fārābī's logic, in terms (...) of which I will attempt to redefine it: the logico-linguistic conception, the project of logicization, and nuclear logic. The final question that will arise is how Aristotle's logic could be built upon AL, which has a nature contrary to logic. The present paper also contributes to examining our traditional research habits in Arabic studies. (shrink)

It is known that Fārābī, in his political program, assumes philosophically some Islamic sciences likekalāmandfiqh. Focusing here on the case of thefiqhand in the limits of hisK. al-Milla, we try to establish correspondences between his theory of legislation and references to historically attested sciences. Our purpose is to show that he was able to articulatefiqhto the political science through an undeclared use ofʿilm uṣūl al-fiqh. He empties this science of its own material and preserves its form in order to fill (...) it with philosophical material. This contributes to clear up his conception in this book of the shift from the voluntary universal to the particular. This shift is governed by a set of formal rules. These guidelines, which are rather deliberative, take place as a subject matter of the political science, alongside with universals, its classical subject matter. We think that these formal rules are borrowed from this typical Islamic science whose subject matter is the study of principles and rules governing the inference, from their sources, of particular legal status, the subject matter offiqh. If, from the strict philosophical point of view, political science provides the sources or foundations from which are inferred the original and primary legislation initiated by the founder of the religion, as well as the derived and secondary one elaborated by his successors, the methodological part of this Islamic science would be the equivalent to the general prescriptions necessary for the application of universals so that concrete cases can be determined. For this purpose, Fārābī borrows willingly from the famous Shāfiʿī’sRisāla, the prototype of the treatises inuṣūl al-fiqh.RésuméIl est un fait notoire: dans son programme politique, Fārābī prend philosophiquement en charge certaines sciences islamiques, telles que lekalāmet lefiqh. En mettant l'accent sur lefiqhet en se limitant à sonK. al-Milla, on tente ici de faire correspondre à sa théorie de la législation des références à des sciences historiques. Il s'agit de montrer que s'il a pu articuler lefiqhà la science politique, c'est moyennant un recours inavoué àʿilm uṣūl al-fiqh, dont il évacue la matière propre, ne gardant que la forme de cette discipline et la remplissant d'un matériau philosophique. Cela rend compte, au moins en partie, de la conception, exposée dans ce livre, du passage de l'universel au particulier dans les choses de la volonté, passage régi par un ensemble de règles formelles. Ce dispositif de nature assez délibérative, vient prendre sa place comme objet de la science politique, à côté des universaux, objet classique de cette science architectonique. Nous pensons que l'idée de ces règles formelles est empruntée à cette science typiquement islamique dont l'objet est l’étude des principes et des règles qui régissent l'inférence des dispositions légales particulières, objet dufiqh, à partir de leurs sources. Si, philosophiquement, la science politique pourvoit aux sources ou fondements dont sont inférées aussi bien la législation originelle ou primaire que la législation dérivée ou secondaire, la partie méthodologique de la science islamique serait l’équivalent des prescriptions générales nécessaires à l'application des universaux pour que des cas concrets puissent être déterminés. À cet effet, Fārābī fait volontiers des emprunts à la fameuseRisālade Shāfiʿī, prototype des traités dans la science desuṣūl al-fiqh. (shrink)

This dissertation offers a new and comprehensive analysis of Abū Naṣr al-Fārābī's cosmology by focusing on various important issues that have been largely neglected by the modern scholarship. It provides an examination of the physical, metaphysical, and astronomical aspects of al-Fārābī's cosmology by adopting a multidisciplinary approach that takes into account the history of philosophy and the history of astronomy. Accordingly, my dissertation explores how al-Fārābī attempted to reconcile features of Ptolemaic astronomy with Aristotelian and Neoplatonic theories, an endeavor which (...) resulted in the formulation of innovative cosmological ideas. Chapters I and II provide background information on al-Fārābī's activity as a commentator and his relation to the Greek commentatorial tradition and assess the relevant primary sources. In addition, they examine al-Fārābī's approach to cosmology and his scientific method in terms of both the Ptolemaic astronomical tradition and the Aristotelian corpus. Chapter III addresses problems related to the structure of al-Fārābī's cosmology, especially the origin of his ennadic cosmological model and his spherology. Particular attention is devoted to the question of how Aristotle's unmoved movers and Ptolemy's astronomical theories are reconciled. Chapters IV, V, and VI analyze the place of celestial matter, intellect, and motion respectively in al-Fārābī's cosmology and attempt to redefine the second teacher's relation to the various trends of Greek philosophy. The study stresses al-Fārābī's connection with the Neoplatonic and Peripatetic currents, particularly with thinkers such as Alexander of Aphrod. (shrink)

Speaking of relations between logic and religion in Islamic world may refer to logic in two respects: logic in religious texts, from doctrinal sacred texts such as Qur’ān and sayings of the Prophet to the Qur’ānic commentaries and the texts related to the principles and fundamentals of jurisprudence, all of which make use of some reasoning to persuade the audiences or to infer the rules and prescripts for religious behavior of the members of religious community; and logic as a discipline (...) that is studied and applied both independently and as a tool for reasoning in schools of Islamic theology, systems of Islamic philosophy, and other types of knowledge in medieval Islamic world, all being strongly influenced by religious doctrines of Islam. Accordingly, this paper speaks of the different manifestations of using logical reasoning, particularly analogy, in Qur’ānic arguments, e.g. for the existence of God and resurrection after death; some contradictions or paradoxes reported by different opponents in the verses of Qur’ān; the place of logic in the classification of disciplines and the courses taught at the schools and seminaries; the influence of the attitudes of different religious sects on logic; the instrumental role of logic for both religious and secular reasonings; the relation between reason and dogmatic religious doctrines, and, finally, the reflection of this relation on progress or recession of logic in medieval Islamic world. (shrink)

I argue that, in the Prior Analytics, higher and above the well-known ‘reduction through impossibility’ of figures, Aristotle is resorting to a general procedure of demonstrating through impossibility in various contexts. This is shown from the analysis of the role of adunaton in conversions of premises and other demonstrations where modal or truth-value consistency is indirectly shown to be valid through impossibility. Following the meaning of impossible as ‘non-existent’, the system is also completed by rejecting any invalid combinations of terms (...) in deductions or conversions. The notion of impossibility reaches the core of Aristotle's system in the Prior Analytics. On the one hand, the use of adunaton shows that he is following one of the two requisites for demonstrative science formulated in the Posterior Analytics, i.e. to demonstrate that it is impossible for things to be otherwise than stated. On the other hand, that demonstrations through impossibility are rooted in the notion of contradiction supp.. (shrink)

RésuméL'ouvrage galéniqueSur les Éléments selon Hippocrateest une importante source d'information concernant les théories physiques de l'antiquité tardive. Les diverses doctrines atomistes discutées par Galien ainsi que les arguments employés par lui pour les réfuter ont été étudiés de près par les premiersMutakallimūn.Les abrégés de cet ouvrage, qui semblent avoir été écrits plusieurs siècles après Galien, et dont certains remontent aux débuts de la culture islamique, présentent un intérêt particulier. Dans cet article, nous donnons une édition, une traduction et une étude (...) d'un abrégé inconnu jusqu'ici, conservé dans un unique manuscrit, qui l'attribue à Ḥunayn ibn Isḥāq. Comme les autres abrégés, il s'agit en fait d'une doxographie de théories physiques qui ne reproduit pas toujours précisément ce que Galien a dit, mais qui reflète le discours de l'époque où elle a été rédigée. (shrink)