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Logic in Islamic philosophy

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Logic Arabic: منطق‎‎ plays an important role in Islamic philosophy Islamic law placed importance on formulating standards of argument, which gave rise to a novel approach to logic in Kalam,citation needed but this approach was later displaced by even earlier ideas from Greek philosophy and Hellenistic philosophy with the rise of the Mu'tazili philosophers,citation needed who highly valued Aristotle's Organon, which had long been established The works of Hellenistic-influenced Islamic philosophers were crucial in the reception of Aristotelian logic in medieval Europe,citation needed along with the commentaries on the Organon by Averroes The works of al-Farabi, Avicenna, al-Ghazali and other Persian Muslim logicians who often criticized and corrected Aristotelian logic and introduced their own forms of logic, also played a central role in the subsequent development of European logic during the Renaissancecitation needed

According to the Routledge Encyclopedia of Philosophy:

"For the Islamic philosophers, logic included not only the study of formal patterns of inference and their validity but also elements of the philosophy of language and even of epistemology and metaphysics Because of territorial disputes with the Arabic grammarians, Islamic philosophers were very interested in working out the relationship between logic and language, and they devoted much discussion to the question of the subject matter and aims of logic in relation to reasoning and speech In the area of formal logical analysis, they elaborated upon the theory of terms, propositions and syllogisms as formulated in Aristotle's Categories, De interpretatione and Prior Analytics In the spirit of Aristotle, they considered the syllogism to be the form to which all rational argumentation could be reduced, and they regarded syllogistic theory as the focal point of logic Even poetics was considered as a syllogistic art in some fashion by most of the major Islamic Aristotelians"

Important developments made by Muslim logicians included the development of "Avicennian logic" as a replacement of Aristotelian logic Avicenna's system of logic was responsible for the introduction of hypothetical syllogism, temporal modal logic and inductive logic Other important developments in early Islamic philosophy include the development of a strict science of citation, the isnad or "backing", and the development of a scientific method of open inquirycitation needed to disprove claims, the ijtihad, which could be generally applied to many types of questions

Contents

  • 1 Logic in Islamic law and theology
  • 2 Aristotelian logic
  • 3 Avicennian logic
  • 4 See also
  • 5 Notes
  • 6 References
  • 7 External links

Logic in Islamic law and theologyedit

Early forms of analogical reasoning, inductive reasoning and categorical syllogism were introduced in Fiqh Islamic jurisprudence, Sharia Islamic law and Kalam Islamic theology from the 7th century with the process of Qiyas, before the Arabic translations of Aristotle's works Later during the Islamic Golden Age, there was a logical debate among Islamic philosophers, logicians and theologians over whether the term Qiyas refers to analogical reasoning, inductive reasoning or categorical syllogism Some Islamic scholars argued that Qiyas refers to inductive reasoning, which Ibn Hazm 994-1064 disagreed with, arguing that Qiyas does not refer to inductive reasoning, but refers to categorical syllogism in a real sense and analogical reasoning in a metaphorical sense On the other hand, al-Ghazali 1058–1111 and in modern times, Abu Muhammad Asem al-Maqdisi argued that Qiyas refers to analogical reasoning in a real sense and categorical syllogism in a metaphorical sense Other Islamic scholars at the time, however, argued that the term Qiyas refers to both analogical reasoning and categorical syllogism in a real sense1

Aristotelian logicedit

The first original Arabic writings on logic were produced by al-Kindi Alkindus 805–873, who produced a summary on earlier logic up to his time The first writings on logic with non-Aristotelian elements was produced by al-Farabi Alfarabi 873–950, who discussed the topics of future contingents, the number and relation of the categories, the relation between logic and grammar, and non-Aristotelian forms of inference2 He is also credited for categorizing logic into two separate groups, the first being "idea" and the second being "proof"

Averroes 1126–98 was the last major logician from al-Andalus, who wrote the most elaborate commentaries on Aristotelian logic

Avicennian logicedit

A drawing of Avicenna from 1271

Avicenna 980-1037 developed his own system of logic known as "Avicennian logic" as an alternative to Aristotelian logic By the 12th century, Avicennian logic had replaced Aristotelian logic as the dominant system of logic in the Islamic world3

The first criticisms of Aristotelian logic were written by Avicenna, who produced independent treatises on logic rather than commentaries He criticized the logical school of Baghdad for their devotion to Aristotle at the time He investigated the theory of definition and classification and the quantification of the predicates of categorical propositions, and developed an original theory on "temporal modal" syllogism Its premises included modifiers such as "at all times", "at most times", and "at some time"

While Avicenna often relied on deductive reasoning in philosophy, he used a different approach in medicine Ibn Sina contributed inventively to the development of inductive logic, which he used to pioneer the idea of a syndrome In his medical writings, Avicenna was the first to describe the methods of agreement, difference and concomitant variation which are critical to inductive logic and the scientific method4

Ibn Hazm 994-1064 wrote the Scope of Logic, in which he stressed on the importance of sense perception as a source of knowledge5 Al-Ghazali Algazel 1058–1111 had an important influence on the use of logic in theology, making use of Avicennian logic in Kalam2 Despite the logical sophistication of al-Ghazali, the rise of the Ash'ari school from the 12th century slowly suffocated original work on logic in much of the Islamic world, though logic continued to be studied in some Islamic regions such as Persia and the Levant

Fakhr al-Din al-Razi b 1149 criticised Aristotle's "first figure" and developed a form of inductive logic, foreshadowing the system of inductive logic developed by John Stuart Mill 1806–1873 Systematic refutations of Greek logic were written by the Illuminationist school, founded by Shahab al-Din Suhrawardi 1155–1191, who developed the idea of "decisive necessity", an important innovation in the history of logical philosophical speculation5 Another systematic refutation of Greek logic was written by Ibn Taymiyyah 1263–1328, the Ar-Radd 'ala al-Mantiqiyyin Refutation of Greek Logicians, where he argued against the usefulness, though not the validity, of the syllogism6 and in favour of inductive reasoning7

See alsoedit

  • Islamic philosophy
  • History of logic

Notesedit

  1. ^ Wael B Hallaq 1993, Ibn Taymiyya Against the Greek Logicians, p 48 Oxford University Press, ISBN 0-19-824043-0
  2. ^ a b History of logic: Arabic logic, Encyclopædia Britannica
  3. ^ I M Bochenski 1961, "On the history of the history of logic", A history of formal logic, p 4-10 Translated by I Thomas, Notre Dame, Indiana University Press cf Ancient Islamic Arabic and Persian Logic and Ontology
  4. ^ Lenn Evan Goodman 2003, Islamic Humanism, p 155, Oxford University Press, ISBN 0-19-513580-6
  5. ^ a b Science and Muslim Scientists, Islam Herald
  6. ^ See pp 253–254 of Street, Tony 2005, "Logic", in Peter Adamson and Richard C Taylor edd, The Cambridge Companion to Arabic Philosophy, Cambridge University Press, pp 247–265, ISBN 978-0-521-52069-0  CS1 maint: Uses editors parameter link
  7. ^ Iqbal, Muhammad 1930, "The Spirit of Muslim Culture", The Reconstruction of Religious Thought in Islam, retrieved 2008-01-25 

Referencesedit

  • Rescher, Nicholas 1964 Studies in the History of Arabic Logic, Pittsburgh: University of Pittsburgh Press
  • Street, Tony 2004 Arabic Logic in: Gabbay, Dov & Woods, John eds,Greek, Indian and Arabic Logic, Volume I of the Handbook of the History of Logic, Amsterdam: Elsevier, pp 523–596

External linksedit

  • "Avicenna Ibn Sina: Logic" Internet Encyclopedia of Philosophy 
  • Routledge Encyclopedia of Philosophy: Logic in Islamic philosophy, Routledge, 1998
  • Muslimphilosophycom: Logic in Islamic philosophy
  • Ancient Islamic Arabic and Persian Logic and Ontology, at Raul Corazzon's Theory and History of Ontology

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