Tractatus de sensu composito & diuiso Magistri Gulielmi He[n]tisberi. : cu[m] expositione infrascriptoru[m]: videlicet. Magistri Alexandri Sermonete. Magistri Bernardini Petri de La[n]ducijs. Magistri Pauli Pergulensis. Magistri Baptiste de Fabriano

Heytesbury, William, active 1340, Sermoneta, Alexander · 1500 · Impressum Uenetijs : P[er] Jacobum Pentium de Leuco · 6 pictures

A 1500 Venetian incunabulum printed by Jacobus Pentius de Leuco, collecting Latin logic treatises by William Heytesbury with commentaries by several later masters, aimed at medieval university students of logic. Its pictures are small diagrams: a cross over a circle divided into quadrants with letters, and a square of opposition with four labelled corners and a central emblem, which suggest clean schematic layouts for arranging text around a central motif.

Knowledge, Theory of · Logic · Logic, Medieval · Incunabula

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