philosophy-of-logic

In Oxford Handbook of Philosophy of Logic. Oxford, UK: Oxford University Press. forthcomingThe usual approach to validity holds that an argument is valid in virtue of its form. This idea has been developed along two main lines: model-theoretic and proof-theoretic. Both frameworks presuppose a distinction between logical and non-logical vocabulary. This chapter introduces these two conceptions of …

Public Announcement Logic (PAL) models knowledge update as world elimination, with the well‑known property that truthful announcements commute: learning p then q yields the same epistemic state as learning q then p. This commutativity is typically treated as a harmless algebraic convenience. I argue that it encodes a substantive philosophical assumption: that epistemic justification is independen…

_History and Philosophy of Logic_. forthcomingSuppose we’re at a horserace, and you turn to me and say, ‘Eclipse is at the finish line!’ But by the time you’ve finished saying this—by the time your utterance is complete—Eclipse is already well past the finish line, and what you’ve said is no longer true. But you did say something true. More generally, we can—and often do—say true things about eve…

Louis deRosset, currently professor of philosophy at the University of Vermont, will be moving to the University of Notre Dame. Professor deRosset works in metaphysics, philosophy of language, and philosophy of logic. He is the author of Fundamental Things: Theory and Applications of Grounding, among other writings, which you can learn more about here. He will be taking up his new position as pro…