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Language in Dispute: The Summulæ Logicales
Language in Dispute: The Summulæ Logicales
Peter of Spain (Pope John XXI d. 1277) & Dinneen, Francis P., S.J.
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According to Fr. Bocheński's [*History of Formal Logic*](https://archive.org/details/historyofformall00boch) ** (p. 149), Peter of Spain ([Pope John XXI](http://plato.stanford.edu/entries/peter-spain/#1))'s work summarized the "creative age" in the history of logic (late 13th cen.).
The third treatise, "De prædicamentis" (PDF pp. 65-77), is a commentary on Aristotle's *Categories*.
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