Disinformation, denial, and the assault on truth

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• Lee McIntyre (Boston University)
• Thursday 01 May 2025, 15:30-17:00
• Hopkinson Lecture Theatre, New Museums Site.

If you have a question about this talk, please contact Dr. Rosanna Dent.

Disinformation is the scourge of the information age, causing both science denial (climate denial, anti-vaxx, etc.) as well as the more recent ‘reality’ denial (Trump’s claim that the 2020 election was stolen, Q-Anon conspiracies, etc.). People do not wake up one day wondering whether there are tracking microchips in the Covid vaccines or a Jewish space laser causing the California wildfires. They are led to those ridiculous, false beliefs through strategic lies, told by those who created them, in service of their own economic, ideological, or political interests. The problem, however, is that once disinformation is in the information stream, it does not just tempt someone to believe a falsehood, but also polarizes them around a factual issue, which undermines trust and poisons the path by which they might revise past beliefs and embrace future true ones.

How to address this? Engaging with deniers is one path. In a recent study in Nature Human Behavior Cornelia Betsch and Phillip Schmid provide the first empirical evidence that science deniers can sometimes be led to give up their false beliefs. Most intriguing, one of the methods for doing this has nothing to do with the content of the belief itself, but focuses instead on the path of reasoning that led them to it. ‘Technique rebuttal’ thus provides a ray of hope for philosophers and other non-scientists to address science (and reality) denial, even if they are not content experts on the topic of denial. But there is a hitch. This method doesn’t always work… and it is slow.

What might work better? In my talk I will explore a few ideas from my most recent book On Disinformation (MIT Press, 2023), in which I claim that the pinch point on the disinformation highway from creation to amplification to belief is to clamp down on the spread of disinformation.

This talk is part of the Departmental Seminars in History and Philosophy of Science series.

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