RésuméLe problème de la détermination de la Qibla est l'une des questions cruciales qui se posent à la culture scientifique de l'Islam médiéval; le résoudre correctement nécessite tant des théories mathématiques que des observations. Les mathématiques relèvent de deux chapitres: la trigonométrie plane et la trigonométrie sphérique. L'observation et les instruments d'observation sont indispensables à la détermination des coordonnées géographiques de La Mecque et du lieu donné; ces coordonnées sont en effet les données que l'on entre dans les formules donnant (...) la Qibla. Dans son Almageste, Abū al-Wafāʾ résout brillamment ce problème. Son travail porte tant sur les mathématiques que sur l'observation; il obtient des solutions modernes, adéquates et faciles. En trigonométrie plane, il donne de nouvelles définitions des fonctions trigonométriques, démontre les formules des sinus, donne une approximation de sin 1° grâce à laquelle il construit des tables de sinus et de tangentes d'une grande précision. En trigonométrie sphérique, il démontre quatre nouveaux théorèmes dont la règle des tangentes ; cette règle lui permet de trouver, comme nous le montrerons, des solutions simples au problème de la détermination de la Qibla. En ce qui concerne les observations, il décrit trois instruments utilisés par lui plusieurs années de suite à Bagdad. Cet article, nourri de nombreux textes arabes originaux traduits et commentés, donne une description détaillée, technique et analytique, des méthodes mathématiques d'Abū al-Wafāʾ pour la détermination de la Qibla. (shrink)

Questions and answers from two great philosophers Why is laughter contagious? Why do mountains exist? Why do we long for the past, even if it is scarred by suffering? Spanning a vast array of subjects that range from the philosophical to the theological, from the philological to the scientific, The Philosopher Responds is the record of a set of questions put by the litterateur Abu Hayyan al-Tawhidi to the philosopher and historian Abu 'Ali Miskawayh. Both figures were foremost contributors to (...) the remarkable flowering of cultural and intellectual life that took place in the Islamic world during the reign of the Buyid dynasty in the fourth/tenth century. The correspondence between al-Tawhidi and Miskawayh holds a mirror to many of the debates and preoccupations of the time and reflects the spirit of rationalistic inquiry that animated their era. It also provides insight into the intellectual outlooks of two thinkers who were divided as much by their distinctive temperaments as by the very different trajectories of their professional careers. Alternately whimsical and tragic, wondering and brooding, trivial and profound, al-Tawhidi’s questions provoke an interaction as interesting in its spiritedness as in its content. This new edition of The Philosopher Responds is accompanied by the first full-length English translation of this important text, bringing this interaction to life for the English reader. (shrink)

Questions and answers from two great philosophers Why is laughter contagious? Why do mountains exist? Why do we long for the past, even if it is scarred by suffering? Spanning a vast array of subjects that range from the philosophical to the theological, from the philological to the scientific, The Philosopher Responds is the record of a set of questions put by the litterateur Abu Hayyan al-Tawhidi to the philosopher and historian Abu 'Ali Miskawayh. Both figures were foremost contributors to (...) the remarkable flowering of cultural and intellectual life that took place in the Islamic world during the reign of the Buyid dynasty in the fourth/tenth century. The correspondence between al-Tawhidi and Miskawayh holds a mirror to many of the debates and preoccupations of the time and reflects the spirit of rationalistic inquiry that animated their era. It also provides insight into the intellectual outlooks of two thinkers who were divided as much by their distinctive temperaments as by the very different trajectories of their professional careers. Alternately whimsical and tragic, wondering and brooding, trivial and profound, al-Tawhidi’s questions provoke an interaction as interesting in its spiritedness as in its content. This new edition of The Philosopher Responds is accompanied by the first full-length English translation of this important text, bringing this interaction to life for the English reader. (shrink)

Recently there is an increasing technological development in intelligent tutoring systems. This field has become interesting to many researchers. In this paper, we present an intelligent tutoring system for teaching information security. This intelligent tutoring systems target the students enrolled in Advanced Topics in Information Security in the faculty of Engineering and Information Technology at Al-Azhar University in Gaza. Through which the student will be able to study the course and solve related problems. An evaluation of the intelligent tutoring systems (...) was carried out and the results were promising. (shrink)

Abzj proposed, in a fragment established and translated herein, two methods to build a parabolic mirror. The lack of demonstration, particularly for the first method, raises a difficult question of interpretation. To understand this method, O. Neugebauer used, in an unpublished article translated herein, concepts of descriptive geometry. He then eliminated the space construction used, to keep only simple geometrical considerations known by the Greeks. The second interpretation, given by R. Rashed, is based on the geometrical practices of al-Bnhzj from (...) Ibn Sinān seems to support this last interpretation. (shrink)

This article examines the development and critique of analogical arguments in the kalām tradition. There are two basic positions on analogical arguments: one holds that if analogical arguments yield certainty, then they are analyzable as deductive inferences, rendering the analogy itself redundant. Proponents of this view thus hold that if the analogy is useful at all, it will never yield the certainty demanded in the rational sciences; another holds that the analogy remains useful even when the argument is deductively sound, (...) either because the universal premise is epistemically dependent on the source case, or, because the source case is useful in dialectical contexts. The exploration of these themes will center around Juwaynī’s formalization and subsequent critique of analogical arguments in the kalām tradition. (shrink)

This article examines the development and critique of analogical arguments in the kalām tradition. There are two basic positions on analogical arguments: (i) one holds that if analogical arguments yield certainty, then they are analyzable as deductive inferences, rendering the analogy itself redundant. Proponents of this view thus hold that if the analogy is useful at all, it will never yield the certainty demanded in the rational sciences; (ii) another holds that the analogy remains useful even when the argument is (...) deductively sound, either because the universal premise is epistemically dependent on the source case, or, because the source case is useful in dialectical contexts. The exploration of these themes will center around Juwaynī’s formalization and subsequent critique of analogical arguments in the kalām tradition. (shrink)

On the branches of knowledge and epistemology from an Islamic perspective.

Juzʼ 1. al-Muqaddimāt. ʻIlm al-kalām. al-Falsafah al-Islāmīyah. al-Murājiʻ wa-al-maṣādir (p. 483-489). --.

Juzʼ 1. al-Falsafah al-Yūnānīyah minṬālīs ilá Aflāṭūn al-Ṭabʻah 2. 1965 -- juzʼ 2. Arisṭū. 1966 -- juzʼ 6. al-Falsafah al-ḥadīthah. al-Ṭabʻah 1. 1969 --.

Ikhwān al-Ṣafāʼ; philosophy, Islamic.

The type of ‘Al-isnād al-āli’ (higher chain of authority) which has great importance for the science of ḥadīths that constitutes the second best source of the Islam, expresses the value in terms of its proximity to the period of the Prophet Muhammad (peace be upon him). If ḥadīth has ‘al-isnād al-āli’ in the works of the scholars provides us with assurance on the intend of the ḥadīth. For this reason, the values of the works of those authors who have constructed (...) their works with al-isnād al-āli undoubted in the science of ḥadīth. However the work of Abu al-Jahm al-Bāhilī’s (d. 228/842) named al-Juz‘ had that kind of ḥadīth, it has not appreciated by scholars, he could not get enough attention in his period and after it. His work contains famous scholar al-Layth Ibn Sa‘d’s (d. 175/791) narrative who claimed by ḥadīth scholars that his students neglected and omitted his ḥadīths and knowledge. Al-Layth Ibn Sa‘d was known doing transmission by written copies. The similarity of al-Layth Ibn Sa‘d narrations in al-Juz‘ with al-Layth narrations, which are also found in other sources, strengthens the claims of the existence of a narrative process based on the written texts in the early periods. In this study, these transfers of Abu al-Jahm reflected on other works will be examined and tried to build narrations of his teacher al-Layth Ibn Sa‘d. country, we can say that the article will contribute to the studies of the history of religions.Summary: Ḥadīth works written in the third century of hijri are the most distinguished sources. The most fundamental works in the science of ḥadīth were written in this time. In the following period, numerous studies have been committed to paper on them. One of the eminent works is the named al-Juz’, which belongs to Abu al-Jahm al-Bāhilī (d. 228/842). The author was not a person that was taken into consideration much during his time. It is possible to that he has been criticized about his scientific proficiency (al-Jarh). Nevertheless, al-Juz’ attracts attention due to the fact that it contains the type of ‘al-Isnād al-āli’ (higher chain of authority). Al-Isnād al-āli, which means access with the least number of narration from the author to the Prophet has very major role to determining of being dependable and certainty of the ḥadīths. The work of Abu al-Jahm which contains the ‘al-Isnād al-āli’ did not attract enough attention. However, another value of the al-Juz‘ is that its been included the narration of famous muhaddith Al-Layth Ibn Sa'd (d. 175/791). He is one of the valued mujtahid imams who have played an active and important role in second century of hijri. Al-Layth's narrations have been available insufficient amount present day. At this point the al-Juz‘ of Abu al-Jahm has great important because it contains many narrations of his shaykh Al-Layth Ibn Sa'd.The Juz‘ seems to has attracted the attention of the ḥadīths scholars in the following period. Indeed, various authors had the get authorization to narrate al-Juz‘. Furthermore, it is also known that some scholar in his period utilized his narration in their own study. For in¬stance, it was declared by Ibn Ḥajar (d. 852/1449) that al-Bukhārī (d. 256/870) had a narra¬tion belonging to Abu al-Jahm in his work ‘al-Ṣaḥīḥ al-Bukhārī’ with a muʻallaq chain (Omit¬ting his name). In the following periods, we come across famous muhaddith such as Aḥmad b. Ḥanbal (d. 241/855), al-Ṭabaranī (d. 360/971), Abū Bakr al-Marwazī (d. 292/905), al-Dāraquṭnī (d.385/995) and al-Bayhaqī (d. 458/1066) who received qualify of Juz's narra¬tion. Although the narrations of Abu al-Jahm are included in the prominent works of schol¬ars, it is clearly seems that the Juz‘ had not enough value except being procure as a written text. As far as we determined there are eleven narration of Abu al-Jahm in the main ḥadīth sources. In addition, we detected that some studies which contain some ḥadīth of al-Juz’ are list them in the same layout and order. This situation indicates that al-Juz’ is owned by these people as a duplicated edition and they narrated by not only orally transmitted but also spread by writing copy. This inference strengthens the theory which conceived by Modern researcher Fuad Sezgin (1924-2018) that ḥadīth transmission had conducted not only through oral transfer but also through written copies.Even though he lived in a very active time of oral transmission of ḥadīth and the time of specific journey for learning and pursuing ḥadīth, it is seen that Abu al-Jahm formed his Juz‘ from the ḥadīths that he procured only from his six shaykhs. That was quite less amount in that period. Juz‘, has an ʿAlāʾ al-Rijāl classification (ranked according to narrators) as ex¬pected in his period method. Abu al-Jahm began his study with his shaykh Al-Layth Ibn Sa'd’s narration, then completed with Sufyān ibn ʿUyayna’s. Juz‘ includes 112 ḥadīths. Ex¬cept two muʻallaq isnāds (omitting one or more narrators), all of ḥadīth has muttaṣil isnāds (narrators in the chain connected each other without omitting). Al-Juz‘ available nowadays in a published form. It seems that some of ḥadīth datas included in the Juz‘ have content against Islamic juris-prudential judgements. For example, the Prophet’s sayings ‘One or two swallow of breast milk does not make haram’ and ‘Nobody can fast or pilgrimage for the benefit of someone else’; allowing to Subay‘a al-Aslamī to marry without waiting her ‘iddah (waiting period of a woman after the death of her husband or divorce); when she gave birth, ʿUthmān b. ʿAffān’s permission to al-Rubay‘a bint Mu‘avvidh not to wait her ‘iddah; when ʿAbd Allāh b. ʿUmar has nasal bleeding he leaves the prayer, goes to wash, then back and continue where he leave off, without taking ablution; and describing marriage with polytheist women as for¬bidden (ḥarām). Of course, all this information must be examined within the framework of Islamic jurisprudence. However, Abu al-Jahm stands alone (tafarrūd) in such issues, it can be seen as the reasons to be recognized as a censured person (majrūḥ).Al-Juz‘ included 66 isnāds of Al-Layth Ibn Sa'd’s narration. Therefore it leaves behind all the works that compile the narration of Ibn Sa'd. That is why, we hypothesize that Juz‘ is a form of Al-Layth’s study that has survived to the present days. As a matter of fact, the muhaddiths who included the narrations of Al-Layth in their works, especially Ibn ḳuṭlūbughā could not ignore the Juz‘ of Abu al-Jahm; on the contrary, they took it as reference. In this case, it should be said that Abu al-Jahm al-Bāhilī is a loyal follower of Al-Layth and the word at¬tributed to Imām Shāfi‘ī and characterizing Al-Layth’s followers with disloyalty is invalid. (shrink)

Hadiths that have been discussed in this paper consist of narrations regarding divine attributes and having some problematic meanings between supporters of Bişr al-Marīsī and ʿUthmān al-Dārimī. These narrations were mostly accepted denounced (munkar) by Bişr al-Marīsī and his sopporters due to having an anthropormophist and corporealist content about God. They rejected divine attributes according to their understanding of God based on incomparability (tanzīh) which provided by Mutazilite approach towards divine attributes even though they conveyed some features of Ahl al-Ra’y. (...) They found contradicted of attributing human features to God based on their tanzīh understanding, therefore, they interpreted such this kind of narra-tions in terms of their approach or rejected at all. At the other hand, a hard Hadith scholar Uth-man al-Darimi believed that one should accept divine attributes as they are in the Qur’an and Sunna. According to his belief, he considered the explicit meanings of the narrations without interpretation of divine attributes, and based on his perpective he denied Bişr al-Marīsī and his supporters’ interpretations claiming they would cause divesting God of all attributes (ta‘tīl). He argues that these narrations should be taken into considerations based on their explicit mea-nings. The discussions on these hadiths are important due to showing different approaches of scholars from the schools of Ahl al-Ra’y and the ones from Ahl al-Hadith towards the hadith du-ring the period when the main Hadith works were collected. Discussions on the narrations stu-died in this paper reveal two schools’ understandings of divine issues, their approaches to divi-ne attributes, as well inform us their perspectives of hadith in general.Summary: The present paper examines the debates between ʿUthmān al-Dārimī (d. 280/894) and the supporters of Bishr al-Marīsī (d. 218/833) on the divine attributes mentioned in some hadiths in the period when the main hadith books were composed (i.e., III/IXth century). These debates that took place between the scholars of Ahl al-Hadith and Ahl al-Ra’y concern the un-derstanding and interpretation of the hadiths in a certain way.It could be stated that the debates focus on how the hadiths should be understood, or whether it is the explicit meaning of the words or the possible methaphorical meanings beyond them that should be considered.It is worth briefly introducing the parties who discussed the hadiths studied here. The aforementioned discussions about some hadith narrations are between the supporters of Bishr al-Marīsī and ʿUthmān al-Dārimī, one of the important figures of the Ahl al-Hadith who wrote a separate work on these hadiths. This work was written as a rejection of the views of Bishr al-Marīsī and his two students on the attributes of God and some issues regarding hadith.Bishr al-Marīsī was regarded as an important scholar of Kalam who received fiqh education from Abū Yūsuf (d. 182/798). He is a scholar of Ahl al-Ra’y who made scientific dis-cussions with many scholars including Imam al-Shafiʿī (d. 204/820). He was on the council of the Caliph Al-Mamūn (d. 218/833) and had a significant role in the adoption of the idea of the createdness of the Qurʾān (khalq al-Qurʾān).Uthmān al-Dārimī,on the other hand, was a scholar of Ahl al-Hadith who learned ha-dith from the authorities of his era such as Yaḥyā b. Maʿīn (d. 233/847), ʿAlī b. al-Madīnī (d. 234/848), Isḥāq b. Rāhawayh (d. 237/851), and Aḥmad b. Ḥanbal (d. 241/855). Having visited all the important cities for the training of hadith, he learned the hadiths and conveyed them.With the understanding of proving the divine attributes and the opposition of the misin-terpretation of the narratives related to them, the groups advocating the appropriation of these lines in accordance with the understanding of incomparability (tanzīh) have complied the works since the first period. According to ʿUthmān al-Dārimī, the rejection of the divine attributes by Mu'tazila was influential in the emergence of the criticism literature of the Ahl al-Hadith and many authors wrote works in this direction.Regarding a narration by Abū Hurayra, an opponent reports that this narration gives the impression that God has the eyes and ears as we know. ʿUthmān al-Dārimī reports that this hadith proves sight and hearing not the eyes and ear organs. He indicates that God has no like by no means. Therefore, it is slanderous to refer the claim that Allah is made of organs to the Ahl al-Hadith. Abū Dāwūd states that with this hadith the attributes of sight and hearing for God are proved and Jahmiyya’s denial of the divine attributes are rejected.The opponent also considered Abū Hurayra's narration referring to the Prophet: "Faith is from Yemen, wisdom is from Yemen! I feel the breath of your Lord from Yemen!" as denounced (munkar). Because, according to Bishr al-Marīsī and his companions, breath can only come from those with an abdominal cavity, and Allah is free from it. According to ʿUthmān al-Dārimī, the opponent misunderstood. What is meant here is the wind that blows from Yemen and comforts people. In the context of this narration, we see that supporters of Bishr al-Marīsī evaluate the narrative literally, while ʿUthmān al-Dārimī interpret the narrative.Regarding the narration, "You can not approach Allah with something more virtuous than what comes out of it (the Qur'ān)" Ibn al-Saljī reports that Mushabbiha understands this as one with an abdominal cavity and from whom speech comes out. This understanding is in-valid since God is "samad" in the sense that He has no void. With this hadith, it is meant that the Qur'ān comes out of Allah’s presence rather than Allah. According to ʿUthmān al-Dārimī, the real aim of Ibn al-Saljī is to deny God's attribute of speech. There is no doubt that the Qur'ān comes from Him, and those who do not accept it merely deny His attribute of speech.Attributed to Ibn Abbas; The meaning of "yamīn Allah" (the right hand of Allah) in narration "Black Stone (al-ḥajar al-aswad) is the right hand of Allah on earth, handshakes with the people" is not the right hand that we know according to Ibn al-Saljī, it is blessing and grace of Allah. According to ʿUthmān al-Dārimī, who acknowledges that Black Stone is not meant to be a hand, the purpose of Ibn al-Saljī is to deny the two hands mentioned in the verses and ha-diths about Allah with invalid interpretations.ʿUthmān al-Dārimī, who criticized that Ibn al-Saljī quoted from another narration which Ibn Abbās heard from the Prophet, says that such poor narrations should not be spread. In addition, he points out that Ibn al-Saljī's interpretation is ugly and he criticizes it. Because Allah who is mentioned in the narrative is depicted as a young man with curly hair in a green suit. Such a narration is also an untrustworthy narration as it contradicts the authentic narrations of the Prophet. ʿUthmān al-Dārimī, who made this assessment of the narration, rejects the com-ments that the opponent made about the narration. According to the opponent, the phrase "I have come to Allah" means "to come into the presence of Allah in the Garden of Eden." Accor-ding to ʿUthmān al-Dārimī’s understanding, such complicated hadiths should not be only narra-ted.About the narration that are based on the Prophet and he does not know the answer to what he has come to know of himself, then he feels the coolness of his fingers as he puts his hand on his back and learns everything, the opponent evaluates the following: He was not Allah who came to the Prophet, but a well-behaved angel who was being directed by Allah and he was the angel who put his hand. ʿUthmān al-Dārimī rejects this interpretation of that oppo-nent. This comment is also contrary to other authentic hadiths. After he refused to the com-ment of the opponent about relevant narration, ʿUthmān al-Dārimī stated that he could not trust this comment on the basis of the authentic narrations he mentioned.Salaf scholars have preferred to be silent in this regard, as it is seen among the most difficult subjects to talk about divine attributes. However, subsequent generations have held dif-ferent paths in this regard. The basic approaches to understanding the divine attributes can be summarized in three main titles: tafwīd, tashbīh, and ta’wīl. Tafwīd is the path adopted by the early salaf scholars and means to leaving the knowledge about Allah’s entity and attributes to His knowledge. Tashbīh means to compare Allah to the created or the created to Allah. Ta'wīl is to interpret the Qur'ānic verses and hadiths that give the impression that Allah is like the crea-tures with semantics and rational deduction. The ones who deny the adjectives are called as Muʿattila and those who prove their attributes are called as Sifatiyya. According to Ahl al-Ra’y, it is necessary to appropriately make interpretation (ta'wīl) of the attributes giving the impression of anthropomorphism in terms of the dictionary. In the divine attributes, Muʿtazila advoca-ted the incomparability (tanzīh), whereas Ashʿariyya and Māturīdiyya adopted interpretation in accordance with incomparability. Mushabbiha and the Wahhābī-Salafī understanding has also taken the expressions regarding divine attributes with their explicit meanings.The debate between the scholars who lived in the ages II/VIII and III/IX, when the most important works are composed in the science of hadith, is important in that it is the first turn. In addition to this, the debate also contains important information on the approach to the Qur'ānic verses and hadiths, in that it shows two basic approaches, one of which represents the school of Ahl al-Ra’y, and the other represents the school of Ahl al-Hadith.ʿUthmān al-Dārimī generally advocates adhering to the explicit meaning of the narra-tion, while Bishr al-Marīsī and his companions criticize the narration labeling it as denied (mun-kar) or making an interpretation. On rare occasions, the places where ʿUthmān al-Dārimī re-jects the narration and makes interpretation, or where Bishr al-Marīsī and his companions de-fend the narrative can be seen.Interpretations made by Bishr al-Marīsī on the problematic narratives have influenced on the next scholars. Alongside Muʿtazilite scholars such as al-Jubbāʾī (d. 303/916), Qāḍī ʿAbd al-Jabbār (d. 415/1024) and Abū l-Ḥusayn al-Baṣrī (d. 436/1044), his interpretations have been quoted by Sunni scholars such as al-Ghazālī (d. 505/1111), Ibn ʿAqīl (d. 513/1119) and Fakhr al-Dīn al-Rāzī (d. 606/1210).The fact that the truth can be put forward in the science of hadith, which is based on the narration, does not favor one of the "narration" and "ra’y", it should be kept in mind that both of these depend on the proper and balanced use of both. To reveal the truth, the narration is in need of the opinion and the opinion (ra’y) is in need of the narration. Narration and opinion sho-uld be seen as complementary elements, not each other's opponents. (shrink)

A Poet of the Abbasid Period, Abū al-Qāsim al-Zāhī 313–352 AH/925– 963 CE: His Life and Poetry. By Khalid Sindawi. Codices Arabici Antiqui, vol. 12. Wiesbaden: Harrassowitz, 2010. Pp. 59 + 180. €54.

The encounter of the medieval Muslims with Greek philosophy undeniably shaped the course of their philosophical and theological thought. This encounter led to the complex and contentious issue of ‘philosophy versus theology’. Medieval Muslim thinkers needed to develop a response to the issue of philosophy versus theology. The present article will first highlight the response of the Islamic theologians to their encounter with Greek philosophy in the form of three major trends in medieval Islamic theology: (1) strong opposition to the (...) application of reason and rationalist approach to Islamic doctrines, and strict adherence to the actual text of the Qur’an and the Hadith, (2) the adoption of Greek philosophy, and the application of reason and rationalist approach to explain and defend Islamic religion and (3) acknowledging the significance of reason in exploring the matters related to the natural world but, at the same time, stressing the subordination of reason to revelation. This article will discuss Atharism, Muʿtazilism and Ashʿarism as the representatives of the first, second and third trends, respectively. The response of the medieval Islamic theologians to the issue of philosophy versus theology serves as a context in which medieval Muslim philosophers carried out their philosophy–theology debate. The article will proceed to show that some medieval Muslim philosophers, such as Abu Bakr Al-Razi, subordinated religion or revelation to philosophy or reason. Other medieval Muslim philosophers, such as Al-Ghazali, subordinated philosophy to theology. The third group of medieval Islamic philosophers represented by Alfarabi argued for the reconciliation and harmonious co-existence of philosophy and religion. Contribution: This article highlights the response of medieval Islamic theologians and philosophers to the issue of philosophy versus theology that was caused by their encounter with Greek philosophy. (shrink)