Silvia Di Vincenzo

Avicenna’s ground-breaking view of logic as both a tool for other sciences and a science in its own right has already attracted scholars’ attention and has been studied in several different respects. The present paper aims to address a specific issue entailed by considering logic as a science in its own right: that is, assessing the relation in which logic as a science stands to the other sciences, and particularly to metaphysics and psychology. The inquiry will focus on a fundamental, yet tricky, passage of chapter I.4 of Avicenna’s Kitāb al-Madḫal, the opening work of his most comprehensive philosophical summa, the Kitāb al-Šifāʾ (Book of Healing). Due to the obscurity of some of Avicenna’s references, chapter I.4 “on the subject-matter of logic” has stimulated numerous attempts at interpretation from the Middle Ages to today. In this paper, I will attempt to provide a new reading of the chapter in light of Avicenna’s definition of the epistemological status of science in Burhān II.7.

The thesis deals with a section of the major philosophical summa by Avicenna (Ibn Sīnā, d. 1037), namely the Book of the Healing (Kitāb al-Šifāʾ). The summa is structured into four parts, devoted to Logic, Natural Philosophy, Mathematics and Metaphysics; the section at stake is Avicenna’s reworking of Porphyry’s Isagoge (Kitāb al-Madḫal, i.e. “Book of the Introduction”) opening the section of Logic of the Šifāʾ. The thesis is articulated into three main parts, namely (i) an edition of the Arabic text of Avicenna’s Madḫal, (ii) an English translation and (iii) a systematic commentary; these three main parts are preceded by an Introduction (0) divided into two halves: (0a) a General Introduction focused on the doctrinal major innovations of the work and (0b) an Introduction to the Edition of the text, which offers a first comprehensive study of its direct and early indirect tradition and explains the criteria of the edition. (i) The only previous edition of Avicenna’s Madḫal was the one printed in Cairo in 1952 (then reprinted in Tehran in 1983 and in Beirut in 1993), based on ten manuscripts. The huge manuscript tradition of Avicenna’s Madḫal – and, more in general, of Avicenna’s Book of the Healing – is still a matter of investigation. According to the provisional results of the bibliographical research conducted in the present work, it can be estimated that the manuscript tradition of the Madḫal amounts to at least 119 certain witnesses and 14 possible additional witnesses (as explained in the Introduction to the edition, 0b). The text of the Cairo edition, far from being representative of the whole textual tradition, was reconstructed on the basis of ten manuscripts that were not selected on the basis of philological criteria and whose reciprocal stemmatic relations were not clear. Although a critical edition based on all the 119 certain witnesses of the work exceeds the scope of the present work, the edition provided in the thesis takes into account a larger number of manuscripts than the Cairo edition did and, most importantly, selects them by means of a preliminary collation made on portions of the text. The purpose of this preliminary collation is making the selection of the manuscripts employed less arbitrary and providing a reconstruction of their stemmatic relations (in the Introduction, 0b). Overall, 32 manuscripts among the 68 inspected were employed in the edition here proposed, 21 of which were systematically collated and 11 were eliminated as codices descripti. The present edition also assumes as a witness the twelfth-century Latin translation of the work, which is, at the present moment, among the earliest extant witnesses of the text. Hopefully, this editorial work allowed us to improve the text of the Cairo edition in a number of points that are crucial to the correct understanding of Avicenna’s argumentation. (ii) As this project started, complete translations of Avicenna’s Madḫal in modern languages were only available in Turkish and Russian. Chapters of the work had also been translated in other languages, but an English translation of the whole work was still a desideratum. A complete English translation is provided in the thesis, based on the newly-established Arabic text of the work and aiming at preserving the major possible consistency in rendering the relevant philosophical terms. As a complement to the translation, an apparatus of notes is offered to facilitate the immediate understanding of the text. (iii) The third section of the thesis consists in a systematic commentary on Avicenna’s Madḫal, which is meant to support a deeper understanding of the text in its entirety. The commentary deals with both historical and philosophical aspects; more in detail, it includes an analysis and an identification, when possible, of Avicenna’s sources, and underlines the points of major philosophical interest of the work, which are dealt in a more comprehensive manner in the General Introduction (0a).

Starting from the 13th century, the question of defining theology as a science gained prominence within a new epistemological reflection on the discipline. It has been hypothesized that the availability of new translations of Aristotelian works significantly contributed to the growing interest among theologians in the theory of science. One of the most prominent intellectuals who recognized the necessity of defining theology as a science and outlining its boundaries and investigative methods in relation to other disciplines, was Albert the Great (d. 1280). Numerous studies have been dedicated to exploring Albert’s treatment of this subject since the 1930s. However, little to no attention has been given to the role played by Arabic sources, particularly the works of Avicenna (Ibn Sīnā, d. 1037), the philosopher and polymath of Persian origin, in shaping Albert’s own definition of theology as a science. This contribution concentrates on the analysis of a section of the Summa Theologiae (Treatise I, quaestio V, chapter 3), with particular emphasis on the ‘translation’ of the logical-argumentative method from its domain of application in scientific and philosophical research to the branch of theology dedicated to safeguarding Christian doctrine against the criticisms and the attacks of heretics. The aim is to analyze how Albert accomplished this translation of the method of inquiry by drawing parallels between the defence of the principles of philosophical inquiry, which is a primary concern of metaphysics, and the defence of the articles of faith in theology. It is by reconciling sources from both the Christian and the Arabo-Islamic traditions that Albert claims the use of a form of dialectic argumentation within theology.

Do Avicenna’s extant works preserve any trace of his now-lost early philosophical production? This paper considers a hitherto neglected text, namely the chapter “On Hypothetical Propositions” from Avicenna’s “Concise Treatise on the Principles of Logic” ( Risāla mūǧaza fī uṣūl al-manṭiq, henceforth: RM ). The new evidence offered by the RM chapter in question will lead to a different reading of another well-known passage of Avicenna’s reworking of Aristotle’s Prior Analytics ( Qiyās ) from the “Book of Healing” ( Kitāb al-šifāʾ ). The clues gathered from an analysis of these two works will finally lead us to ponder the possibility that Avicenna may in fact have composed a (now lost) work on hypothetical propositions and syllogisms. Since Avicenna’s RM is to date unedited, an edition, as well as an English translation of the relevant chapter, is also provided in the Appendix of this paper.