How do we fight for truth and protect democracy in a post-truth world? How does bias affect our understanding of facts? Lee McIntyre is a Research Fellow at the Center for Philosophy and History of Science at Boston University and a Senior Advisor for Public Trust in Science at the Aspen Institute. He holds a B.A. from Wesleyan University and a Ph.D. in Philosophy from the University of Michigan. He has taught philosophy at Colgate University, Boston University, Tufts Experimental College, Simmons College, and Harvard Extension School (where he received the Dean’s Letter of Commendation for Distinguished Teaching). Formerly Executive Director of the Institute for Quantitative Social Science at Harvard University, he has also served as a policy advisor to the Executive Dean of the Faculty of Arts and Sciences at Harvard and as Associate Editor in the Research Department of the Federal Reserve Bank of Boston. His books include On Disinformation and How to Talk to a Science Denier and the novels The Art of Good and Evil and The Sin Eater.