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{{Infobox_Person
| name = [[Person_First_Name:=Walter]] [[Person_Last_Name:=Burley]]
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| birth_date = [[Birth Date:=1275]]
| birth_place = [[Birth_Country_Name:=England]]
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| death_date = [[Death Date:=1344]]
| death_place = [[Death_City:=Paris?]], [[Death_Country_Name:=France?]]
| death_cause = unknown
| occupation = [[NAICS/54|Philosopher]]
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'''Walter Burley''' (or Burleigh), c.1275-1344/5, was a [[medieval]] [[English people|English]] [[logician]]. He was a [[Master of Arts (Oxbridge)|Master of Arts]] at [[Oxford]] in 1301, and a [[fellow]] of [[Merton College]], [[Oxford]] until 1305. He studied theology in [[Paris]] from before 1310, and by c.1320 he was a [[doctor of theology]] at [[Paris]]. He was a fellow of the [[Sorbonne]] by 1324. After studying [[William of Ockham]]'s commentary on the [[Sentences]] of [[Peter Lombard]], Burley opposed Ockham on a number of points concerning logic and [[natural philosophy]].
== Life ==
== Work ==
His main work was the ''De Puritate Artis Logicae Tractatus Longior'', in which he covers such topics as the truth conditions for complex sentences, both [[truth-functional]] and [[modal]], as well as providing rules of inferences for different types of inferences. He was one of the first logicians to recognize the priority of the [[propositional logic|propositional calculus]] over the [[first-order logic|predicate calculus]], despite the fact that the latter had been the main focus of logicians up until this period.
== Influence ==
==Primary sources ==
* ''De Puritate Artis Logicae Tractatus Longior''
*''Treatise on Suppositions''
*''In Aristotelis Perihermenias'' (''Questions on Aristotle's Perihermenias'', 1301)
*''De Formis''
==Secondary sources ==
* Broadie, Alexander. ''Introduction to Medieval Logic'' (Oxford: Clarendon Press, 1993).
* Walter Burley. ''De Puritate Artis Logicae Tractatus Longior, with a revised edition of the Tractatus Brevior'', ed. P. Boehner (New York: 1955).
* Walter Burley. ''On the Purity of the Art of Logic. The Shorter and Longer Treatises'', trans. & ed. P.V. Spade (New Haven & London: Yale University Press, 2000).
* Walter Burley. ''De Formis'', ed. Frederick J. Down Scott (Munich: Verlag der Bayerischen Akademie der Wissenschaften, 1970 ISBN 3769690044).
* Gracia, J.G. and Noone, T.B., ''A Companion to Philosophy in the Middle Ages'', London 2003
== Links ==
== Notability ==
This philosopher has [[Bcmp Pages:=1]] pages in the ''Blackwell Companion''.
[[Category:Philosophers]]