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Don Fallis

Professor of Philosophy and Computer Sciences

Interdisciplinary with College of Social Sciences and Humanities

Research Interests

  • Epistemology
  • Philosophy of information
  • Philosophy of mathematics


  • PhD in Philosophy, University of California, Irvine
  • MA in Philosophy, University of California, Irvine
  • BA in Philosophy, University of California, Irvine
  • BA in Psychology, University of California, Irvine


Don Fallis is a professor in the Department of Philosophy and Religion and Khoury College of Computer Sciences at Northeastern University. Before joining Northeastern University, Fallis was a professor in the School of Information at the University of Arizona. He has held visiting fellowships at the University of St. Andrews and the University of Utah.

Fallis’ main focus is adversarial epistemology, where he examines how individuals obtain knowledge in a deceptive world while understanding the types of lies and disinformation that exist in society. His other interests include epistemology, philosophy of information, and philosophy of mathematics. He regularly teaches courses on decision-making, information economics, information ethics, information quality, and knowledge in the digital world.

His articles on lying and deception have appeared in the Journal of Philosophy, Philosophical Studies, and the Australasian Journal of Philosophy. He has also been featured on Philosophy TV, where he discussed the standard analysis of lying and the intention to deceive. He is on the organizing committee of the Information Ethics Roundtable and an associate editor for Episteme: A Journal of Individual and Social Epistemology.