Henry and I chat with Dr Sacha Altay about:

* How prevalent is misinformation?

* What even is “misinformation”?

* Is there a difference between politics and science?

* How impactful are propaganda, influence campaigns, and advertising?

* What impact has social media had on modern democracies?

* How worried should we be about the impact of generative AI, including deepfakes, on the information environment?

* The “liar’s dividend”

* Whether ChatGPT is more accurate and less biased than the average politician, pundit, and voter.

Links

* Sacha Altay

* “Misinformation Reloaded? Fears about the Impact of Generative AI on Misinformation are Overblown” Felix M. Simon, Sacha Altay, & Hugo Mercier

* “Don’t Panic (Yet): Assessing the Evidence and Discourse Around Generative AI and Elections” Felix M. Simon & Sacha Altay

* “The Media Very Rarely Lies” Scott Alexander

* “How Dangerous is Misinformation?” Dan Williams

* “Scapegoating the Algorithm” Dan Williams

* “Is Social Media Destroying Democracy—Or Giving It To Us Good And Hard?” Dan Williams

* “Not Born Yesterday: The Science of Who We Trust and What We Believe” Hugo Mercier

* Joseph Uscinski

* “Durably Reducing Conspiracy Beliefs Through Dialogues with AI” Thomas H. Costello, Gordon Pennycook, & David G. Rand

* “The Levers of Political Persuasion with Conversational AI” Kobi Hackenburg, Ben M. Tappin, et al.

* Ben Tappin

Chapters

* 00:00 Understanding Misinformation: Definitions and Prevalence

* 04:22 The Complexity of Media Bias and Misinformation

* 14:40 Human Gullibility: Misconceptions and Realities

* 27:28 Selective Exposure and Demand for Misinformation

* 29:49 Political Advertising: Efficacy and Misconceptions

* 35:13 Social Media’s Role in Political Discourse

* 40:50 Evaluating the Impact of Social Media on Society

* 42:44 The Impact of Political Content on Social Media

* 46:57 The Changing Landscape of Political Voices

* 51:41 Generative AI and Its Implications for Misinformation

* 01:03:46 The Liar’s Dividend and Trust in Media

* 01:14:11 Personalization and the Role of Generative AI

Transcript

* Please note that this transcript was edited by AI and may contain mistakes.

Dan Williams: Okay, welcome back. I’m Dan Williams. I’m back with Henry Shevlin. And today we’re going to be talking about one of the most controversial, consequential topics in popular discourse, in academic research, and in politics, which is misinformation. So we’re going to be talking about how widespread is misinformation? Are we living through, as some people claim, a misinformation age, a post-truth era, an epistemic crisis?

How impactful is misinformation and more broadly domestic and foreign influence campaigns? What’s the role of social media platforms like TikTok, YouTube, like Facebook, like X when it comes to the information environment? Is social media a kind of technological wrecking ball which has smashed into democratic societies and created all sorts of havoc? And also what’s the impact of generative AI when it comes to the information environment?

Both when it comes to systems like ChatGPT, but also when it comes to deepfakes, use of generative AI to create hyper-realistic audio, video, and images. Fortunately, we’re joined by Sacha Altay, brilliant heterodox researcher in the misinformation space, who pushes back against what he perceives to be simplistic and alarmist takes concerning misinformation.

So we’re going to be picking Sacha’s brain and just more generally having a chat about misinformation, social media, and the information environment. So Sacha, maybe just to kick things off, in your estimation, if we’re keeping our focus on Western democracies, how prevalent is misinformation?

Sacha Altay: Hi guys, my pleasure to be here. So it’s a very difficult question because we need to define what is misinformation. So we’ll first stick to the empirical literature on misinformation and look at the scientific estimates of misinformation. For that, there are basically two ways or three ways to define misinformation. One of them is to look at fact-checked false news.

So false news that have been fact-checked by fact-checkers as being false or misleading. And by this account, misinformation is quite small on social media, like Facebook or Twitter. It’s in between 1 and 5% of all the content or all the news that people come across. So according to this definition, it’s quite small. There is some variability across country. For instance, it seems to be higher in country like, I don’t know, the US or France than the UK or Germany.

There is another definition which is a bit more expansive because the problem with fact-checked false news is that you rest entirely on the work of fact-checkers and of course fact-checkers cannot fact-check everything and not all misinformation is news. So you see the problems. So another way is to just look at the sources of information and you classify them based on how good they are and how basically how much they share reliable information, how much they have good journalistic practice, et cetera. And the advantage of this technique is that you can have a much broader range because you can have, I don’t know, 3,000 sources of information that share information. And usually it broadly like most of the information that people see. And according to the definitions, misinformation is also quite small. So the definition is just for misleading information that comes from the sources that are judged as unreliable. And by this definition, misinformation is also quite small. Again, it’s like about like one to 5% of all the news that people encounter.

But then of course, the problem is not all the information that people encounter comes in this form. And for instance, some of it can come in terms of like images or all the sorts of things. And so this broadens the definition of misinformation. So some people think that when you broaden this definition, you have much more misinformation. My reading is that when you broaden this definition, you actually include so much more information that you increase the denominator. So of course, there’s going to be more misinformation, but because the denominator is larger, the proportion is going to be pretty much the same. But that’s an empirical question. So let’s say to sum up that it’s smaller than people think, according to the scientific estimates.

Henry Shevlin: If I can just come in here, a point that Dan you’ve emphasized in our conversations to me, and I think Scott Alexander has also emphasized in a great blog post called The Media Very Rarely Lies, is that a lot of what people think of as misinformation is just true information selectively expressed or couched in a way that naturally leads people to maybe form false beliefs but doesn’t involve presentation of falsehoods. Does that sort of feature in any of these sort of more expansive definitions of misinformation? Is it possible to create definitions that can capture this kind of deceptive, intentionally deceptive but not strictly false content?

Sacha Altay: I’d say that when you look at the definitions based on the sources, if a source is systematically biased and systematically misrepresent evidence and stuff, they are going to be classified as misinformation. I think the problem and the more subtle point is that these sources are not very important because people don’t trust them very much. But the bigger problem is when much more trusted sources who have a much larger reach, like I don’t know the BBC or the New York Times, they are accurate like most of the time, but sometimes and on systematic issues like I don’t know, they can be wrong. And that’s the bigger issue because they are right most of the time. So they have a big reach, they have big trust, but they are wrong sometimes. And that’s the problem.

Dan Williams: But I think just to focus on that observation of Henry’s, you might say, well, they’re accurate most of the time, but nevertheless, you can have a media outlet which is strictly speaking accurate most of the time with every single news story that it reports on. But because of the ways in which it selects, omits, frames, packages, contextualizes information, nevertheless end up misinforming audiences, even if every single story that they’re reporting on is on its merits, sort of factual and evidence-based.

I mean, I think the way that I understand what’s happening in this broader debate about the prevalence of misinformation is round about 2016 when we had Brexit in the United Kingdom and then the first election of Donald Trump, there was this massive panic about misinformation because many people thought maybe that’s what’s driving a lot of this support for what gets called like right-wing authoritarian populist politics. And around that time when people were thinking of the term misinformation, they were kind of thinking of fake news in the sort of literal sense of that term. So false outright fabricated information presented in the format of news. And as you pointed out, when researchers then looked at the prevalence of that kind of content, which you don’t really find when it comes to establishment news media for the most part, like there are always gonna be exceptions, that stuff is pretty rare.

And then one of the responses to that is to say, okay, if you’re only looking at like outright fake news, then you’re missing all of these other ways in which communication can be misleading by being selective, by omitting relevant context through framing, through kind of subtle ideological biases.

And then my view on that is, well, once you’ve expanded the term to that extent, and you’ve got this really kind of elastic, amorphous definition, it becomes really kind of analytically useless. Like you’re just bundling together so many different things. And that kind of content is also really pervasive

Id. d’épisode : 1000746367173

GUID : substack:post:185546769

Date de publication : 23/1/2026 à 18:40:02