INVITED TALKS

	University of Missouri (April 2021, via Zoom): “Beyond ought-implies-can: Impersonal obligatoriness implies historical contingency.”
	University of Wisconsin-Madison (November 2018): “Time travel: Processes and paradoxes.”  [Video] [PowerPoint]
	University of Copenhagen Facts & Norms Workshop III (August 2017): “I ought, therefore I can obey.”
	Hamburg University workshop “Imperatives: Worlds and Beyond” (June 2016): “New foundations for imperative logic.”
	New York University workshop “Imperatives and Deontic Modals” (March 2016): “Natural deduction for imperative logic.”
	Beijing Normal University (August 2012), University of Warsaw (May 2012), and University of Otago (December 2011, via Skype): “New foundations for imperative logic III: A general definition of argument validity.”
	University of Warsaw (May 2012): “In defense of imperative inference.”
	Illinois State University (April 2010): “I ought, therefore I can.”
	University of Warsaw (May 2012), University of Wisconsin-Milwaukee (November 2008), and University of California-Santa Barbara (June 2008): “New foundations for imperative logic II: Pure imperative inference.”

	University of Warsaw (May 2012), Arizona State University (April 2007), and University of Wisconsin-Madison (January 2006): “New foundations for imperative logic I: Logical connectives, consistency, and quantifiers.”
	University of Denver (October 2005): “Against moral character evaluations: The undetectability of virtue and vice.”
	First Formal Epistemology Workshop (University of California at Berkeley, May 2004): “Have your cake and eat it too: The Old Principal Principle reconciled with the New.”
	University of British Columbia (August 2002): “New foundations for deontic logic: A preliminary sketch.”
	University of British Columbia (July 2001) and 2001 Pacific APA (San Francisco): “Restraint is sweeter than revenge: The prudential rationality of habitual respect.”
	Peter Wall Institute for Advanced Studies (July 2001), Jesus College, Oxford (March 2001), University of St Andrews (February 2001), Iowa State University (January 2001), California Institute of Technology (May 2000), New York University (January 2000), and Carnegie Mellon University (January 2000): “Against moral character evaluations.”
	London School of Economics and Political Science (December 2000): “Can I kill my younger self? Time travel and the Retro-Suicide Paradox.”

REFEREED TALKS

	2020 Central APA (Chicago): “The individuation of obligations.”
	2019 Central APA (Denver): “A new argument for ought-implies-can.”
	DEON 2016 – 13th International Conference on Deontic Logic and Normative Systems (Bayreuth): “Natural deduction for imperative logic II: Quantified pure imperative logic.”
	DEON 2014 – 12th International Conference on Deontic Logic and Normative Systems (Ghent): “Natural deduction for imperative logic I: Sentential pure imperative logic.”
	2012 Central APA (Chicago): “A general definition of argument validity.”
	Seventh Formal Epistemology Workshop (Konstanz, September 2010): “New foundations for imperative logic III: A general definition of argument validity.”
	2010 Central APA (Chicago): “In defense of imperative inference.”
	2008 Pacific APA (Pasadena) and Fourth Formal Epistemology Workshop (Carnegie Mellon University, June 2007): “New foundations for imperative logic II: Pure imperative inference.”
	2007 Central APA (Chicago): “Three objections to ought-implies-can.”
	2006 Central APA (Chicago): “I ought, therefore I can.”
	2006 Pacific APA (Portland) and DEON 2004 – Seventh International Workshop on Deontic Logic in Computer Science (Madeira): “New foundations for imperative logic I: Logical connectives, consistency, and quantifiers.”
	2005 Central APA (Chicago): “Do cry over spilt milk: Possibly you can change the past.”
	2003 Central APA (Cleveland): “Aristotle on the best good: Is Nicomachean Ethics 1094a18-22 fallacious?”
	2002 Philosophy of Science Association Conference (Milwaukee): “Hempel's raven paradox: A lacuna in the standard Bayesian solution.”
	DEON 2002 – Sixth International Workshop on Deontic Logic in Computer Science (London): “New foundations for deontic logic: A preliminary sketch.”
	2002 Rutgers Epistemology Conference: “Have your cake and eat it too: The Old Principal Principle reconciled with the New.”
	2002 Pacific APA (Seattle): “Time travel: Two kinds of ability paradoxes.”
	1999 Eastern APA (Boston): “Can I kill my younger self? Time travel and the Retro-Suicide Paradox.”
	1999 Central APA (New Orleans): “Against global moral evaluations.”
	1999 Pacific APA (Berkeley): “Most people are overall neither good nor bad.”
	1998 Philosophy of Science Association Conference (Kansas City) and 1998 World Congress of Philosophy (Boston): “Who’s afraid of undermining? Why the Principal Principle need not contradict Humean Supervenience.”
	1998 Pacific APA (Los Angeles) and 1998 World Congress of Philosophy (Boston): “Epsilon-ergodicity and the success of equilibrium statistical mechanics.”

COMMENTS

	2008 Wisconsin Epistemology Conference: Comments on Earl Conee’s “Rational disagreement defended.”
	2006 Formal Epistemology Workshop: Comments on Lydia McGrew’s “Is foundationalism good for Bayesianism?” and on Timothy McGrew’s “Is Bayesianism good for foundationalism?”
	2005 Formal Epistemology Workshop: Comments on Greg Restall and Gillian Russell’s “Barriers to inference.”