Monthly Archives: April 2016

Medieval logicians on ‘and’, Part 2

In this post I continue my tour through what medieval logicians have to say about ‘and’ or conjunction (here is Part 1). Roger Bacon in the Art and Science of Logic [1] introduces a distinction between when ‘and’ is used … Continue reading

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Medieval logicians on ‘and’, Part 1

Another item on my todo list reads “24. Med Log on &”. So much research time and effort is put into the conditional, or the consequence, and also into negation, while other propositional connectives are relatively little discussed, at least, … Continue reading

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Happy birthday, Averroes!

On this day in 1126, ʾAbū l-Walīd Muḥammad Ibn ʾAḥmad Ibn Rušd, better known to western Scholastics as Averroes, was born. In addition to writing short and long commentaries on Aristotle’s logical and physical works, he also wrote defenses of … Continue reading

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Cassatio, part 1

In March, a group of us met every Friday to read through Paul of Venice’s treatise on insolubles. During discussion one morning, the cassatio solution came up, and I realized how very little I knew of it. During the meeting, … Continue reading

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