Tag Archives: Roger Bacon

Syllogism Mnemonics

The other day a colleague of mine asked if I had anything I could send him regarding the medieval syllogism mnemonics. I told him there was some info in the textbook I’m writing, but it’s rather idiosyncratic to the way … Continue reading

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The Logicians Who Say ‘Ne’

I’m currently in Stockholm for the 3rd Nordic Logic Summer School where I’ve been giving a introduction to logic in the Middle Ages. I brought along the Big Four (the textbooks of Bacon, Sherwood, Lambert, and Peter), as well as … 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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Ex impossibili sequitur quidlibet in the 13th C (part 1)

Two weeks ago, I wrote about Ex impossibili sequitur quidlibet in the 12th C. Today, I come back to one of the promises there, namely, to look at part of Joke Spruyt’s “Thirteenth-Century Positions on the Rule ‘Ex Impossibili Sequitur … Continue reading

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Why should we care about history of logic? (expanded)

The goal of this post is to expand on the slides, linked in the previous post, for the talk I gave at the Australasian Association of Logic two weeks ago, on “Why should we care about history of logic?” This … 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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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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