Browsing All Posts filed under »Logic«

Open Logic Update: OER Week

March 9, 2018 by


This week (March 5-9, 2018) is OER week (OER stands for Open Educational Resources). As many of you know, I’ve been working on a free and open logic textbook, forallx: Calgary Remix. You can find my last update, including plenty of links, here. For OER week, Richard Zach and I gave a one hour workshop […]

It’s a Small World: The Leśniewski-Sobociński Theorem.

February 21, 2018 by


The other day I was reading M. Resnik’s Frege and the Philosophy of Mathematics (1980). In discussing `Frege’s way out’, he mentions a proof by Leśniewski showing that Frege’s attempted fix to the system of the Grundgesetze is inconsistent, but gives a reference to a paper published by Sobociński in 1949. This intrigued me, as […]

Teaching Logic and Forallx Update

December 7, 2017 by


As many of you might remember, I taught the Logic I course here at UCalgary for the first time, and blogged about the experience here, here and here. You might also remember that I was involved in remixing a version of PD Magnus’ and Tim Button’s forallx open textbook for that course (see here and […]

The Further Adventures of Hero and Hera.

September 27, 2017 by


Those familiar with the neo-logicism literature, may also be familiar with the characters Hero and Hera. Hero was introduced by Crispin Wright in the late `90s, and the story Hero and his sister Hera was fleshed out by Philip Ebert and Marcus Rossberg in 2007*. In that paper, we learn that Hero and Hera both […]

Teaching as a Grad Student: Logic End of Semester

May 23, 2017 by

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This is the 5th post in this series, and the third about my experience teaching for the first time (see parts one, and two). As of a couple of weeks ago, I finally managed to submit the final marks for the Logic I course I had been teaching, marking the end of my responsibilities for […]

Teaching as a Grad Student: Guest Lecturing on Logicism

April 26, 2017 by

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I was recently given the opportunity to give a lecture on Frege’s logicism and related topics for our Logic III course (cross-listed as an undergraduate and a graduate course). That class had gotten up to the point of looking at second-order Peano Arithmetic, which is a natural jumping off point for looking at the logic […]

Cognitive Dissonance and Philosophy

April 5, 2017 by


I want to first give credit to the authors of “Mistakes Were Made (but not by me)” – Carol Tavris and Elliot Aronson. Their talk of cognitive dissonance and the metaphor of the ‘pyramid of choice’ has inspired my comments below. Although the ideas in this book have obvious ramifications for psychology, psychotherapy, political science, […]