Migotti, Mark Harding Cheyne‏Odland, Brent C.2020-06-302020-06-302020-06-22Odland, Brent C. (2020). Peirce’s Triadic Logic: Continuity, Modality, and L (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.http://hdl.handle.net/1880/112238In 1909, in his Logic Notebook, Charles Sanders Peirce conducted what, to my knowledge, are the first experiments with many-valued post-Aristotelian logic. As these experiments are entirely contained in a handful of pages in his notebook, which were not published or discussed by other authors during his lifetime, his reasons are open to conjecture. By examining and transcribing these pages and connecting them to his larger body of philosophy, I show how his motivations lie within his views on modality, continuity, and his hypothetical cosmology.University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.Three Valued LogicCharles S. PeirceContinuityModalityPhilosophymaster thesis10.11575/PRISM/37964