Tag Archives: William of Sherwood

Ex impossibili sequitur quidlibet in the 13th C (part 2)

Oh, look, it’s Thursday again! Time to write another medieval logic post. We’re still doing Aristotle in my intro class, so I haven’t any new interesting medieval tidbits from class prep to share. So I guess I’ll just return to … Continue reading

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Integrating medieval logicians into Introduction to Logic

Term starts next week, and I am so pleased to be teaching again what is probably my favorite course ever, Introduction to Logic. Most of it is going to be a pretty standard Intro Logic course: syntax and semantics of … Continue reading

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What’s in a name?

Yesterday I was writing up comments on an essay on Heloise and Abelard, and found myself, somewhat to my surprise, stubbornly referring to her exclusively as “d’Argenteuil”. After all, we call him “Abelard”, not “Peter”, so why shouldn’t we afford … Continue reading

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Spotlight on William of Sherwood

When one thinks of the big names of medieval logic, it’s probably ones like William of Ockham, Jean Buridan, and Walter Burley that come to mind — or, if you’re a 13th C person, maybe Peter of Spain. So people … Continue reading

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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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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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