A seminar at the workshop Algebra and Substructural Logic 5 (La Trobe, December 2015).
I explain how the `trace model’ for relevant arithmetic (introduced here) can be extended quite naturally to model a logic including a de Morgan negation. The result is not a model for the logic R, but for its weaker cousin, TW.
I’m Greg Restall, and this is my personal website. I teach philosophy and logic as Professor of Philosophy at the University of Melbourne. ¶ Start at the home page of this site—a compendium of recent additions around here—and go from there to learn more about who I am and what I do. ¶ This is my personal site on the web. Nothing here is in any way endorsed by the University of Melbourne.