The Science of Logic According to Diego Ortiz
The Science of Logic According to Diego Ortiz

Summary/Abstract: The article analyzes one of the most significant aspects of logical legacy of Diego Ortiz (Jacob Ortizius, 1564–1625), the professor of Vilnius University, also of Lublin, Poznan and Pultusk Jesuit Colleges. The article concentrates on the metalogical level included in Ortiz’s lectures on logic delivered in Poznan Jesuit College and Vilnius University. This level includes questions about the logic’s status, object and origin. The article concludes that, in explaining the status and object of logic, Ortiz became a participant of the scholastic controversy, siding with the Occamists in the first dispute and with the Thomists in the second. As for the origin of logic, Ortiz was faithful to the scholastic tradition that derived logic from the reflexive human experience. Ortiz also proclaimed Aristotle as the first and final creator of logic, by asserting that everything that was invented and written in logic after Aristotle could be easily derived from what magister dixit.

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