John Dumbleton
Encyclopedia
John Dumbleton one of the Oxford Calculators
Oxford Calculators
The Oxford Calculators were a group of 14th-century thinkers, almost all associated with Merton College, Oxford, who took a strikingly logico-mathematical approach to philosophical problems....

, was a Scholastic
Scholasticism
Scholasticism is a method of critical thought which dominated teaching by the academics of medieval universities in Europe from about 1100–1500, and a program of employing that method in articulating and defending orthodoxy in an increasingly pluralistic context...

 logician and natural philosopher at Merton College, Oxford
Merton College, Oxford
Merton College is one of the constituent colleges of the University of Oxford in England. Its foundation can be traced back to the 1260s when Walter de Merton, chancellor to Henry III and later to Edward I, first drew up statutes for an independent academic community and established endowments to...

, where he was a fellow by 1338. His magnum opus
Masterpiece
Masterpiece in modern usage refers to a creation that has been given much critical praise, especially one that is considered the greatest work of a person's career or to a work of outstanding creativity, skill or workmanship....

was the Summa logicae et philosophiae naturalis ("Compendium of Logic and Natural Philosophy"), probably written in the 1340s.
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