Overview
Walter Sinnott-Armstrong is Chauncey Stillman Professor of Practical Ethics in the Department of Philosophy and the Kenan Institute for Ethics at Duke University. He has secondary appointments in the Law School and the Department of Psychology and Neuroscience, and he is core faculty in the Duke Center for Cognitive Neuroscience, the Duke Institute for Brain Sciences, and the Duke Center for Interdisciplinary Decision Sciences. He serves as Resource Faculty in the Philosophy Department of the University of North Carolina at Chapel Hill, Partner Investigator at the Oxford Centre for Neuroethics, and Research Scientist with The Mind Research Network in New Mexico. He has visited at National Cheng Kung University in Taiwan, the Macquarie Research Center for Agency, Values, and Ethics in Australia, and the National Institutes of Health in Washington. He has received fellowships from the Harvard Program in Ethics and the Professions, the Princeton Center for Human Values, the Oxford Uehiro Centre for Practical Ethics, the Center for Applied Philosophy and Public Ethics at the Australian National University, and the Sage Center for the Study of the Mind at the University of California, Santa Barbara. He has served as co-chair of the Board of Officers of the American Philosophical Association, co-director of the MacArthur Law and Neuroscience Project, and co-PI of the project on the Neuroscience and Philosophy of Free Will and Moral Responsibility at Chapman University. He earned his bachelor’s degree from Amherst College and his doctorate from Yale University. He has published widely on ethics (theoretical and applied as well as meta-ethics), empirical moral psychology and neuroscience, philosophy of law, epistemology, philosophy of religion, and informal logic. Most recently, he is the author of Think Again: How to Reason and Argue, Morality Without God?, and Moral Skepticisms; co-author with Robert Fogelin of Understanding Arguments, Ninth Edition, and with Jesse Summers of Clean Hands: Philosophical Lessons of Scrupulosity; and editor of Moral Psychology, volumes I-V. His numerous articles have appeared in a variety of philosophical, scientific, and popular journals and collections. He performs various experiments in moral psychology and brain science with his Moral Attitudes and Decisions (MAD) Lab. He is working on one book on moral artificial intelligence and another book that will develop a contrastivist view of freedom and responsibility. He co-directs Summer Seminars in Neuroscience and Philosophy (SSNaP) with Felipe De Brigard and teaches a popular MOOC, Think Again, on the Coursera website with Ram Neta.
Current Duke Appointments & Affiliations
Recent Scholarly Works
Burden of Proof in Philosophy: Lessons From Law via Schauer
Journal article Legal Theory · June 26, 2026 Philosophy needs a methodology, including rules about burden of proof, in order to resolve many of its classic issues. Law might seem to provide a helpful model for assigning burdens of proof. However, candidate rules that distribute burden of proof accord ... Full text CiteBeyond Advance Directives: A Machine Learning Tool to Aid End-of-Life Decisions in Dementia Care
Conference JOURNAL OF PAIN AND SYMPTOM MANAGEMENT · June 2026 Link to item CiteForgetting and blame: When cognitive lapses excuse and when they backfire.
Journal article Journal of experimental psychology. Applied · May 2026 Forgetting is often cited to explain or excuse failures to meet obligations and duties. But does it actually reduce blame? Across seven preregistered experiments (total N = 6,181), we test when and why forgetting mitigates or exacerbates blame. We f ... Full text CiteRecent Grants
Humilities Across Cultures: Do Children in China and the U.S. Value Intellectual Humility for Moral and Epistemic Beliefs?
ResearchCollaborator · Awarded by John Templeton Foundation · 2024 - 2027Building empathy for listening, learning, and depolarization in the US and Brazil
ResearchPrincipal Investigator · Awarded by Templeton World Charity Foundation · 2024 - 2027Tests of consciousness in humans, animals and AI: An in-person meeting
ConferencePrincipal Investigator · Awarded by Canada Institute for Advanced Research · 2024 - 2026View All Grants