Lee McIntyre is Research Fellow at the Center for Philosophy and History of Science at Boston University. Formerly Executive Director of the Institute for Quantitative Social Science at Harvard University, he has taught philosophy at Colgate University, Boston University, Simmons University, Tufts Experimental College, and Harvard Extension School. He is the author of Dark Ages, Post-Truth, The Scientific Attitude, and How to Talk to a Science Denier. His new book is On Disinformation: How to Fight for Truth and Protect Democracy. Shermer and McIntyre discuss: default to truth theory • RFK Jr. • whether reason evolved for veridical perception or group identity? • How do we know what is true and what to believe? • What is disinformation? • worst case scenarios if Donald Trump wins in 2024 • trans issues, race issues, GMOs, nuclear power, climate doomsdayism • facts and values • science and morality • What went wrong during the COVID-19 pandemic? • lies and disinformation about masks and vaccines • social media companies responsibility for disinformation • what we should do personally and politically about disinformation.