|Died||c. 1359 – c. 1362|
|Institutions||University of Paris|
Jean Buridan (French: [byʁidɑ̃] ; Latin: Johannes Buridanus; c. 1301 – c. 1359/62) was an influential 14th century French philosopher.
Buridan was a teacher in the faculty of arts at the University of Paris for his entire career, focusing in particular on logic and the works of Aristotle. Buridan sowed the seeds of the Copernican revolution in Europe.He developed the concept of impetus, the first step toward the modern concept of inertia and an important development in the history of medieval science. His name is most familiar through the thought experiment known as Buridan's ass; however, this thought experiment does not appear in his extant writings.
Buridan was born sometime before 1301, perhaps at or near the town of Béthune in Picardy, France,or perhaps elsewhere in the diocese of Arras. He received his education in Paris, first at the Collège du Cardinal Lemoine and then at the University of Paris, receiving his Master of Arts degree and formal license to teach at the latter by the mid-1320s.
Unusually, he spent his entire academic life in the faculty of arts, rather than obtaining the doctorate in law, medicine or theology that typically prepared the way for a career in philosophy.Also unusual for a philosopher of his time, Buridan further maintained his intellectual independence by remaining a secular cleric, rather than joining a religious order. A papal letter of 1330 refers to him as simply, "clericus Atrebatensis diocoesis, magister in artibus [a cleric from the Diocese of Arras and Master of Arts]." As university statutes permitted only those educated in theology to teach or write on the subject, there are no writings from Buridan on either theological matters or commentary of Peter Lombard's Sentences .
Speculation on his reasons for avoiding religious matters have remained uncertain.Most scholars think it is unlikely that he went unnoticed, given his philosophical talents. As well, it is unlikely that he could not afford to study theology, given that he received several bursaries and stipends. Indeed, he is listed in a document from 1350 as being among the teachers capable of supporting themselves without the need for financial assistance from the University. Zupko has speculated that Buridan "deliberately chose to remain among the 'artists [artistae]'," possibly envisioning philosophy as a secular enterprise based on what is evident to both the senses and the intellect, rather than the non-evident truths of theology revealed through scripture and doctrine.
The last appearance of Buridan in historical documents came in 1359, where he was mentioned as the adjudicator in a territorial dispute between the English and Picard nations.It is supposed that he died sometime after then, since one of his benefices was awarded to another person in 1362.
The bishop Albert of Saxony, himself renowned as a logician, was among the most notable of his students.[ citation needed ]
An ordinance of Louis XI of France in 1473, directed against the nominalists, prohibited the reading of his works.[ citation needed ]
Where is the very wise Heloise,
For whom was castrated, and then (made) a monk,
Pierre Esbaillart (Abelard) in Saint-Denis?
For his love he suffered this sentence.
Similarly, where is the Queen (Marguerite de Bourgogne)
Who ordered that Buridan
Were thrown in a sack into the Seine?
Oh, where are the snows of yesteryear!
Apocryphal stories abound about his reputed amorous affairs and adventures which are enough to show that he enjoyed a reputation as a glamorous and mysterious figure in Paris life.None of the stories can be confirmed, and most contradict known historical information.
Some rumors hold that he died when the King of France had him put in a sack and thrown into the River Seine after his affair with the Queen came to light. François Villon alludes to this in his famous poem Ballade des Dames du Temps Jadis . Others suggest that he was expelled from Paris due to his nominalist teachings and moved to Vienna to found the University of Vienna. Another story talks of him hitting Pope Clement VI with a shoe.
The concept of inertia was alien to the physics of Aristotle. Aristotle, and his peripatetic followers held that a body was maintained in motion only by the action of a continuous external force. Thus, in the Aristotelian view, a projectile moving through the air would owe its continuing motion to eddies or vibrations in the surrounding medium, a phenomenon known as antiperistasis . In the absence of a proximate force, the body would come to rest almost immediately.
The theory of impetus proposed that motion was maintained by some property of the body, imparted when it was set in motion. Buridan was the first to name this motion-maintaining property impetus but the theory itself probably did not originate with him. A less sophisticated notion of impressed forced can be found in the Avicenna's doctrine of mayl (inclination).In this he was possibly influenced by John Philoponus who was developing the Stoic notion of hormé (impulse). The major difference between Buridan's theory and that of his predecessor is that he rejected the view that the impetus dissipated spontaneously, instead asserting that a body would be arrested by the forces of air resistance and gravity which might be opposing its impetus. Buridan further held that the impetus of a body increased with the speed with which it was set in motion, and with its quantity of matter. This is closely related to the modern concept of momentum. Buridan saw impetus as causing the motion of the object:
Buridan also contended that impetus is a variable quality whose force is determined by the speed and quantity of the matter in the subject. In this way, the acceleration of a falling body could be understood in terms of its gradual accumulation of units of impetus.
Because of his developments, historians of science Pierre Duhemand Anneliese Maier both saw Buridan as playing an important role in the demise of Aristotelian cosmology. Duhem even called Buridan the forerunner of Galileo. Zupko has disagreed, pointing out that Buridan did not use his theory to transform the science of mechanics, but instead remained a committed Aristotelian in thinking that motion and rest are contrary states and that the universe is finite in extent.
Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.
Marsilius of Inghen was a medieval Dutch Scholastic philosopher who studied with Albert of Saxony and Nicole Oresme under Jean Buridan. He was Magister at the University of Paris as well as at the University of Heidelberg from 1386 to 1396.
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Nicole Oresme, also known as Nicolas Oresme, Nicholas Oresme, or Nicolas d'Oresme, was a significant philosopher of the later Middle Ages. He wrote influential works on economics, mathematics, physics, astrology and astronomy, philosophy, and theology; was Bishop of Lisieux, a translator, a counselor of King Charles V of France, and one of the most original thinkers of 14th-century Europe.
Albert of Saxony was a German philosopher and mathematician known for his contributions to logic and physics. He was bishop of Halberstadt from 1366 until his death.
The Condemnations at the medieval University of Paris were enacted to restrict certain teachings as being heretical. These included a number of medieval theological teachings, but most importantly the physical treatises of Aristotle. The investigations of these teachings were conducted by the Bishops of Paris. The Condemnations of 1277 are traditionally linked to an investigation requested by Pope John XXI, although whether he actually supported drawing up a list of condemnations is unclear.
Abu'l-Barakāt Hibat Allah ibn Malkā al-Baghdādī was an Islamic philosopher, physician and physicist of Jewish descent from Baghdad, Iraq. Abu'l-Barakāt, an older contemporary of Maimonides, was originally known by his Hebrew birth name Baruch ben Malka and was given the name of Nathanel by his pupil Isaac ben Ezra before his conversion from Judaism to Islam later in his life.
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The theory of impetus was an auxiliary or secondary theory of Aristotelian dynamics, put forth initially to explain projectile motion against gravity. It was introduced by John Philoponus in the 6th century, and elaborated by Nur ad-Din al-Bitruji at the end of the 12th century. The theory was modified by Avicenna in the 11th century and Hibat Allah Abu'l-Barakat al-Baghdaadi in the 12th century, before it was later established in Western scientific thought by Jean Buridan in the 14th century. It is the intellectual precursor to the concepts of inertia, momentum and acceleration in classical mechanics.
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John (Johannes) Hennon was a Dutch medieval philosopher in the late Scholastic tradition. He was from Nijmegen, and studied at the University of Paris, where he received his magister artium and baccalaureus formatus in sacra pagina (1463).
Ancient, medieval and Renaissance astronomers and philosophers developed many different theories about the dynamics of the celestial spheres. They explained the motions of the various nested spheres in terms of the materials of which they were made, external movers such as celestial intelligences, and internal movers such as motive souls or impressed forces. Most of these models were qualitative, although a few of them incorporated quantitative analyses that related speed, motive force and resistance.
Medieval philosophy is the philosophy that existed through the Middle Ages, the period roughly extending from the fall of the Western Roman Empire in the 5th century to the Renaissance in the 15th century. Medieval philosophy, understood as a project of independent philosophical inquiry, began in Baghdad, in the middle of the 8th century, and in France, in the itinerant court of Charlemagne, in the last quarter of the 8th century. It is defined partly by the process of rediscovering the ancient culture developed in Greece and Rome during the Classical period, and partly by the need to address theological problems and to integrate sacred doctrine with secular learning.
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In quantified modal logic, the Buridan formula and the converse Buridan formula (i) syntactically state principles of interchange between quantifiers and modalities; (ii) semantically state a relation between domains of possible worlds. The formulas are named in honor of the medieval philosopher Jean Buridan by analogy with the Barcan formula and the converse Barcan formula introduced as axioms by Ruth Barcan Marcus.
The often repeated tradition that he was born in the town of Béthune is spurious.
|Wikisource has the text of the 1911 Encyclopædia Britannica article Buridan, Jean .|