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Ibn Wasil

Ibn Wasil is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ibn Wasil rather than just read about it. In short: Ibn Wāṣil (AD 1208–1298 [AH 604–697]) was a Syrian judge, scholar and writer. He was a courtier and diplomat of the Ayyubids and their successors, the Mamlūks.

Ibn Wasil — main illustration
Ibn Wasil — illustration

Key takeaways

  • Ibn Wasil belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Ibn Wasil to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Ibn Wasil from memory before moving on to harder problems.

Reference excerpt

Ibn Wāṣil (AD 1208–1298 [AH 604–697]) was a Syrian judge, scholar and writer. He was a courtier and diplomat of the Ayyubids and their successors, the Mamlūks. Although trained as a religious scholar, in his own time he was renowned as a logician and today is most famous as a historian, especially of the Ayyubids. He also wrote works on poetry, medicine and astronomy.

Life Abū ʿAbd Allāh Jamāl al-Dīn Muḥammad ibn Sālim ibn Naṣr Allāh ibn Sālim ibn Wāṣil, commonly known simply as Ibn Wāṣil, was born in Ḥamā on 20 April 1208. His father was the qāḍī (judge) of Ḥamā and later al-Maʿarra, and worked as a mudarris (teacher) at the school known as the Nāṣiriyya by the Golden Gate in Jerusalem. He studied under his father. When the latter was away on the Ḥajj from 1227 to 1229, he took over some of his duties at the Nāṣiriyya. He witnessed the siege of Damascus in the spring of 1229. In 1230–1231, he studied in Damascus and Aleppo, where he was taught by Ibn Shaddād. His main education was a religious one. He studied fiqh (jurisprudence) and ḥadīth (tradition), and issued opinions as a muftī. In 1232, Ibn Wāṣil joined the court of al-Nāṣir Dāʾūd, emir of Karak. There he studied under Shams al-Dīn al-Khusrūshāhī. In 1234, he joined the court of al-Muẓaffar II, emir of Ḥamā, who ordered him to help ʿAlam al-Dīn Qayṣar in constructing an astronomical observatory and an astrolabe. In 1236, he returned to Damascus, the ruled by the Emir Ḥusām al-Dīn ibn Abī ʿAlī, who became his patron. In 1243–1244, Ibn Wāṣil travelled with his relative Ibn Abi ʾl-Dam first to Baghdad and thence to Cairo. In Egypt, he studied under the physician Ibn al-Nafīs. In 1252, he performed the Ḥajj in the company of Ḥusām al-Dīn ibn Abī ʿAlī. He returned to Cairo. In August 1261, he was sent by the Sultan Baybars on an embassy to King Manfred of Sicily. He met Manfred in Barletta. In 1264 or 1265, he moved back to Ḥamā, where he was appointed chief qāḍī. He spent most of his time writing. He was blind in old age, dying aged 93 years according to the Islamic calendar.

Works

Ibn Wāṣil wrote in Arabic. He wrote four works on logic, only two of which survive; four works of history; two works on poetry; and works on philosophical theology, astronomy and medicine, the last two being lost. Ibn Wāṣil belonged to the "western" school of logic associated with Fakhr al-Dīn al-Rāzī. In his work against logic, Ibn Taymiyya referred to Ibn Wāṣil as a "leading philosopher". His works on logic include two commentaries on the work of the Egyptian logician al-Khūnajī. The commentary on al-Khūnajī's al-Jumal fiʾl-manṭiq ('The Sum of Logic') was his most popular logical work and survives in four manuscript, including three bearing the dates AH 680 (AD 1281), 738 (1337–1338) and 746 (1345). The other commentary on al-Khūnajī does not survive. Ibn Wāṣil also wrote a logical treatise, al-Risāla al-anbrūriyya ('The Imperial Treatise'), for King Manfred of Sicily. This survives in a single manuscript from 1281 under the title Nukhbat al-fikar fī tathqīf al-naẓar. Ibn Wāṣil later revised this treatise under the title Nukhbat al-fikar fiʾl-manṭiq ('The Pick of Reflection on Logic'). The first of Ibn Wāṣil's histories is Taʾrīkh al-Ṣāliḥī ('The Ṣāliḥī History'), a general history of Islam from the time of Muḥammad to the year AH 636/637 (AD 1239/1240). It was first dedicated to Sultan al-Ṣāliḥ Najm al-Dīn Ayyūb sometime between 1244 and 1249, and then re-dedicated to al-Muʿaẓẓam Tūrānshāh after the death of al-Ṣāliḥ in 1249. The second is Naẓm al-durar fi ʾl-ḥawādith wa ʾl-siyar, dedicated to Sultan Tūrānshāh (1249–1250). The third is Mufarrij al-kurūb fī akhbār Banī Ayyūb ('The Dissipater of Anxieties on the Reports of the Ayyubids'), a history of the Ayyubids down to 1263 and his most valuable work for later historians. It was written at Ḥamā between 1272 and 1285. Although ending in 1263, it contains a reference to the battle of Benevento in 1266. It survives in four incomplete manuscripts, but the complete text can be reconstructed from these. Ibn Wāṣil wrote two works on poetry. The Tajrīd al-Aghānī (or Mukhtaṣar al-Aghānī) is a summary of the 10th-century Kitāb al-aghānī, a collection of poems performed at various courts. It was commissioned by the Emir al-Manṣūr II during Ibn Wāṣil's later period at Ḥamā. Three manuscript copies are known. He also wrote a commentary on a work on Arabic prosody by his teacher Ibn al-Ḥājib. Two copies are known, but the work spawned a series of commentaries in the following century. Although he received a religious education, Ibn Wāṣil's interest lay in the rational sciences. His only work on religion falls in the realm of kalām (speculative theology). This was the Mukhtaṣar al-arbaʿīn fī uṣūl al-dīn ('The Summary of Forty Questions on the Bases of Religion'), a commentary on a work by al-Rāzī. It has not survived. Ibn Wāṣil's scientific works were no more popular. No copies of his two works on astronomy and medicine have survived. His work on astronomy, Nukhbat al-amlāk fī hayʾat al-aflāk, was dedicated to Tūrānshāh. His medical work was a summary of his teacher Ibn Bayṭār's al-Mufrada.

Notes

Bibliography El-Shayyal, Gamal El-Din (1971). "Ibn Wāṣil". In Lewis, B.; Ménage, V. L.; Pellat, Ch. & Schacht, J. (eds.). The Encyclopaedia of Islam, Second Edition. Volume III: H–Iram. Leiden: E. J. Brill. p. 967. OCLC 495469525. Ibn Wāṣil al-Ḥamawī (2022). Khaled El-Rouayheb (ed.). Commentary on the Jumal on Logic. Brill. Hirschler, Konrad (2014). "Ibn Wāṣil: An Ayyūbid Perspective on Frankish Lordships and Crusades". In Alex Mallett (ed.). Medieval Muslim Historians and the Franks in the Levant. Brill. pp. 136–160. doi:10.1163/9789004280687. Humphreys, R. Stephen (1977). From Saladin to the Mongols: The Ayyubids of Damascus, 1193–1260. State University of New York Press. Waddy, Charis (1934). An Introduction to the Chronicle Called "Mufarrij al Kurūb fī Akhbār Banī Ayyūb" by Ibn Wāṣil (PDF) (PhD dissertation). SOAS, University of London.

Worked examples

Example 1 — a first encounter with Ibn Wasil

Start with the simplest possible case. Write down what Ibn Wasil claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ibn Wasil before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ibn Wasil ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ibn Wasil

In research
Ibn Wasil appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Ibn Wasil in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Ibn Wasil is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1208 births, 1298 deaths, 13th-century Arabic-language writers, so understanding it makes those chapters shorter.
In everyday life
Look for Ibn Wasil outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Ibn Wasil in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Ibn Wasil means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Ibn Wasil out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ibn Wasil in simple terms?

Ibn Wāṣil (AD 1208–1298 [AH 604–697]) was a Syrian judge, scholar and writer. He was a courtier and diplomat of the Ayyubids and their successors, the Mamlūks.

Why does Ibn Wasil matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ibn Wasil?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ibn Wasil.

Tags

  • 1208 births
  • 1298 deaths
  • 13th-century Arabic-language writers
  • 13th-century Muslims
  • Ambassadors to the Kingdom of Sicily
  • Historians of the medieval Islamic world
  • Logicians
  • People from Hama
  • Qadis
  • Scholars from the Ayyubid Sultanate

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