Science
Why AI is better than humans at talking people out of their conspiracy theory beliefs
Roughly half of Americans subscribe to to some sort of conspiracy theory, and their fellow humans haven’t had much success coaxing them out of their rabbit holes.
Perhaps they could learn a thing or two from an AI-powered chatbot.
In a series of experiments, the artificial chatbot was able to make more than a quarter of people feel uncertain about their most cherished conspiracy belief. The average conversation lasted less than 8½ minutes.
The results were reported Thursday in the journal Science.
The failure of facts to convince people that we really did land on the moon, that Al Qaeda really was responsible for the 9/11 attacks, and that President Biden really did win the 2020 election, among other things, has fueled anxiety about a post-truth era that favors personal beliefs over objective evidence.
“People who believe in conspiracy theories rarely, if ever, change their mind,” said study leader Thomas Costello, a psychologist at American University who investigates political and social beliefs. “In some sense, it feels better to believe that there’s a secret society controlling everything than believing that entropy and chaos rule.”
But the study suggests the problem isn’t with the persuasive power of facts — it’s our inability to marshal the right combination of facts to counter someone’s specific reasons for skepticism.
Costello and his colleagues attributed the chatbot’s success to the detailed, customized arguments it prepared for each of the 2,190 study participants it engaged with.
For instance, a person who doubted that the twin towers could have been brought down by airplanes because jet fuel doesn’t burn hot enough to melt steel was informed that the fuel reaches temperatures as high as 1,832 degrees, enough for steel to lose its structural integrity and trigger a collapse.
A person who didn’t believe Lee Harvey Oswald had the skills to assassinate President John F. Kennedy was told that Oswald had been a sharpshooter in the Marines and wouldn’t have had much trouble firing an accurate shot from about 90 yards away.
And a person who believed Princess Diana was killed so Prince Charles could remarry was reminded of the 8-year gap between Diana’s fatal car accident and the future king’s second wedding, undermining the argument that the two events were related.
The findings suggest that “any type of belief that people hold that is not based in good evidence could be shifted,” said study co-author Gordon Pennycook, a cognitive psychologist at Cornell University.
“It’s really validating to know that evidence does matter,” he said.
The researchers began by asking Americans to rate the degree to which they subscribed to 15 common conspiracy theories, including that the virus responsible for COVID-19 was created by the Chinese government and that the U.S. military has been hiding evidence of a UFO landing in Roswell, N.M. After performing an unrelated task, participants were asked to describe a conspiracy theory they found particularly compelling and explain why they believed it.
The request prompted 72% of them to share their feelings about a conspiracy theory. Among this group, 60% were randomly assigned to discuss it with the large language model GPT-4 Turbo.
A screenshot of the chatbot used by researchers to test whether AI could help change people’s minds about conspiracy theories.
(Thomas H. Costello)
The conversations began with the chatbot summarizing the human’s description of the conspiracy theory. Then the human rated the degree to which he or she agreed with the summary on a scale from 0 to 100.
From there, the chatbot set about making the case that there was nothing fishy going on. To make sure it wasn’t stretching the truth in order to be more persuasive, the researchers hired a professional fact-checker to evaluate 128 of the bot’s claims about a variety of conspiracies. One was judged to be misleading, and the rest were true.
The bot also turned up the charm. In one case, it praised a participant for “critically examining historical events” while reminding them that “it’s vital to distinguish between what could theoretically be possible and what is supported by evidence.”
Each conversation included three rounds of evidence from the chatbot, followed by a response from the human. (You can try it yourself here.) Afterward, the participants revisited their summarized conspiracy statements. Their ratings of agreement dropped by an average of 21%.
In 27% of cases, the drop was large enough for the researchers to say the person “became uncertain of their conspiracy belief.”
Meanwhile, the 40% of participants who served as controls also got summaries of their preferred conspiracy theory and scored them on the 0-to-100 scale. Then they talked with the chatbot about neutral topics, like the U.S. medical system or the relative merits of cats and dogs. When these people were asked to reconsider their conspiracy theory summaries, their ratings fell by just 1%, on average.
The researchers checked in with people 10 days and 2 months later to see if the effects had worn off. They hadn’t.
The team repeated the experiment with another group and asked people about their conspiracy-theory beliefs in a more roundabout way. This time, discussing their chosen theory with the bot prompted a 19.4% decrease in their rating, compared with a 2.9% decrease for those who chatted about something else.
The conversations “really fundamentally changed people’s minds,” said co-author David Rand, a computational social scientist at MIT who studies how people make decisions.
“The effect didn’t vary significantly based on which conspiracy was named and discussed,” Rand said. “It worked for classic conspiracies like the JFK assassination and moon landing hoaxes and Illuminati, stuff like that. And it also worked for modern, more politicized conspiracies like those involving 2020 election fraud or COVID-19.”
What’s more, being challenged by the AI chatbot about one conspiracy theory prompted people to become more skeptical about others. After their conversations, their affinity for the 15 common theories fell significantly more than it did for people in the control group.
“It was making people less generally conspiratorial,” Rand said. “It also increased their intentions to do things like ignore or block social media accounts sharing conspiracies, or, you know, argue with people who are espousing those conspiracy theories.”
In another encouraging sign, the bot was unable to talk people out of beliefs in conspiracies that were actually true, such as the CIA’s covert MK-Ultra project that used unwitting subjects to test whether drugs, torture or brainwashing could enhance interrogations. In some cases, the chatbot discussions made people believe these conspiracies even more.
“It wasn’t like mind control, just, you know, making people do whatever it wants,” Rand said. “It was essentially following facts.”
Researchers who weren’t involved in the study called it a welcome advance.
In an essay that accompanied the study, psychologist Bence Bago of Tilberg University in the Netherlands and cognitive psychologist Jean-Francois Bonnefon of the Toulouse School of Economics in France said the experiments show that “a scalable intervention to recalibrate misinformed beliefs may be within reach.”
But they also raised several concerns, including whether it would work on a conspiracy theory that’s so new there aren’t many facts for an AI bot to draw from.
The researchers took a first pass at testing this the week after the July 13 assassination attempt on former President Trump. After helping the AI program find credible information about the attack, they found that talking with the chatbot reduced people’s belief in assassination-related conspiracy theories by 6 or 7 percentage points, which Costello called “a noticeable effect.”
Bago and Bonnefon also questioned whether conspiracy theorists would be willing to engage with a bot. Rand said he didn’t think that would be an insurmountable problem.
“One thing that’s an advantage here is that conspiracy theorists often aren’t embarrassed about their beliefs,” he said. “You could imagine just going to conspiracy forums and inviting people to do their own research by talking to the chatbot.”
Rand also suggested buying ads on search engines so that when someone types a query about, say, the “deep state,” they’ll see an invitation to discuss it with an AI chatbot.
Robbie Sutton, a social psychologist at the University of Kent in England who studies why people embrace conspiracy beliefs, called the new work “an important step forward.” But he noted that most people in the study persisted in their beliefs despite receiving “high-quality, factual rebuttals” from a “highly competent and respectful chatbot.”
“Seen this way, there is more resistance than there is open-mindedness,” he said.
Sutton added that the findings don’t shed much light on what draws people to conspiracy theories in the first place.
“Interventions like this are essentially an ambulance at the bottom of the cliff,” he said. “We need to focus more of our efforts on what happens at the top of the cliff.”
Science
Diablo Canyon clears last California permit hurdle to keep running
Central Coast Water authorities approved waste discharge permits for Diablo Canyon nuclear plant Thursday, making it nearly certain it will remain running through 2030, and potentially through 2045.
The Pacific Gas & Electric-owned plant was originally supposed to shut down in 2025, but lawmakers extended that deadline by five years in 2022, fearing power shortages if a plant that provides about 9 percent the state’s electricity were to shut off.
In December, Diablo Canyon received a key permit from the California Coastal Commission through an agreement that involved PG&E giving up about 12,000 acres of nearby land for conservation in exchange for the loss of marine life caused by the plant’s operations.
Today’s 6-0 vote by the Central Coast Regional Water Board approved PG&E’s plans to limit discharges of pollutants into the water and continue to run its “once-through cooling system.” The cooling technology flushes ocean water through the plant to absorb heat and discharges it, killing what the Coastal Commission estimated to be two billion fish each year.
The board also granted the plant a certification under the Clean Water Act, the last state regulatory hurdle the facility needed to clear before the federal Nuclear Regulatory Commission (NRC) is allowed to renew its permit through 2045.
The new regional water board permit made several changes since the last one was issued in 1990. One was a first-time limit on the chemical tributyltin-10, a toxic, internationally-banned compound added to paint to prevent organisms from growing on ship hulls.
Additional changes stemmed from a 2025 Supreme Court ruling that said if pollutant permits like this one impose specific water quality requirements, they must also specify how to meet them.
The plant’s biggest water quality impact is the heated water it discharges into the ocean, and that part of the permit remains unchanged. Radioactive waste from the plant is regulated not by the state but by the NRC.
California state law only allows the plant to remain open to 2030, but some lawmakers and regulators have already expressed interest in another extension given growing electricity demand and the plant’s role in providing carbon-free power to the grid.
Some board members raised concerns about granting a certification that would allow the NRC to reauthorize the plant’s permits through 2045.
“There’s every reason to think the California entities responsible for making the decision about continuing operation, namely the California [Independent System Operator] and the Energy Commission, all of them are sort of leaning toward continuing to operate this facility,” said boardmember Dominic Roques. “I’d like us to be consistent with state law at least, and imply that we are consistent with ending operation at five years.”
Other board members noted that regulators could revisit the permits in five years or sooner if state and federal laws changes, and the board ultimately approved the permit.
Science
Deadly bird flu found in California elephant seals for the first time
The H5N1 bird flu virus that devastated South American elephant seal populations has been confirmed in seals at California’s Año Nuevo State Park, researchers from UC Davis and UC Santa Cruz announced Wednesday.
The virus has ravaged wild, commercial and domestic animals across the globe and was found last week in seven weaned pups. The confirmation came from the U.S. Department of Agriculture’s National Veterinary Services Laboratory in Ames, Iowa.
“This is exceptionally rapid detection of an outbreak in free-ranging marine mammals,” said Professor Christine Johnson, director of the Institute for Pandemic Insights at UC Davis’ Weill School of Veterinary Medicine. “We have most likely identified the very first cases here because of coordinated teams that have been on high alert with active surveillance for this disease for some time.”
Since last week, when researchers began noticing neurological and respoiratory signs of the disease in some animals, 30 seals have died, said Roxanne Beltran, a professor of ecology and evolutionary biology at UC Santa Cruz. Twenty-nine were weaned pups and the other was an adult male. The team has so far confirmed the virus in only seven of the dead pups.
Infected animals often have tremors convulsions, seizures and muscle weakness, Johnson said.
Beltran said teams from UC Santa Cruz, UC Davis and California State Parks monitor the animals 260 days of the year, “including every day from December 15 to March 1” when the animals typically come ashore to breed, give birth and nurse.
The concerning behavior and deaths were first noticed Feb. 19.
“This is one of the most well-studied elephant seal colonies on the planet,” she said. “We know the seals so well that it’s very obvious to us when something is abnormal. And so my team was out that morning and we observed abnormal behaviors in seals and increased mortality that we had not seen the day before in those exact same locations. So we were very confident that we caught the beginning of this outbreak.”
In late 2022, the virus decimated southern elephant seal populations in South America and several sub-Antarctic Islands. At some colonies in Argentina, 97% of pups died, while on South Georgia Island, researchers reported a 47% decline in breeding females between 2022 and 2024. Researchers believe tens of thousands of animals died.
More than 30,000 sea lions in Peru and Chile died between 2022 and 2024. In Argentina, roughly 1,300 sea lions and fur seals perished.
At the time, researchers were not sure why northern Pacific populations were not infected, but suspected previous or milder strains of the virus conferred some immunity.
The virus is better known in the U.S. for sweeping through the nation’s dairy herds, where it infected dozens of dairy workers, millions of cows and thousands of wild, feral and domestic mammals. It’s also been found in wild birds and killed millions of commercial chickens, geese and ducks.
Two Americans have died from the virus since 2024, and 71 have been infected. The vast majority were dairy or commercial poultry workers. One death was that of a Louisiana man who had underlying conditions and was believed to have been exposed via backyard poultry or wild birds.
Scientists at UC Santa Cruz and UC Davis increased their surveillance of the elephant seals in Año Nuevo in recent years. The catastrophic effect of the disease prompted worry that it would spread to California elephant seals, said Beltran, whose lab leads UC Santa Cruz’s northern elephant seal research program at Año Nuevo.
Johnson, the UC Davis researcher, said the team has been working with stranding networks across the Pacific region for several years — sampling the tissue of birds, elephant seals and other marine mammals. They have not seen the virus in other California marine mammals. Two previous outbreaks of bird flu in U.S. marine mammals occurred in Maine in 2022 and Washington in 2023, affecting gray and harbor seals.
The virus in the animals has not yet been fully sequenced, so it’s unclear how the animals were exposed.
“We think the transmission is actually from dead and dying sea birds” living among the sea lions, Johnson said. “But we’ll certainly be investigating if there’s any mammal-to-mammal transmission.”
Genetic sequencing from southern elephant seal populations in Argentina suggested that version of the virus had acquired mutations that allowed it to pass between mammals.
The H5N1 virus was first detected in geese in China in 1996. Since then it has spread across the globe, reaching North America in 2021. The only continent where it has not been detected is Oceania.
Año Nuevo State Park, just north of Santa Cruz, is home to a colony of some 5,000 elephant seals during the winter breeding season. About 1,350 seals were on the beach when the outbreak began. Other large California colonies are located at Piedras Blancas and Point Reyes National Sea Shore. Most of those animals — roughly 900 — are weaned pups.
It’s “important to keep this in context. So far, avian influenza has affected only a small proportion of the weaned at this time, and there are still thousands of apparently healthy animals in the population,” Beltran said in a press conference.
Public access to the park has been closed and guided elephant seal tours canceled.
Health and wildlife officials urge beachgoers to keep a safe distance from wildlife and keep dogs leashed because the virus is contagious.
Science
When slowing down can save a life: Training L.A. law enforcement to understand autism
Kate Movius moved among a roomful of Los Angeles County sheriff’s deputies, passing out a pop trivia quiz and paper prism glasses.
She told them to put on the vision-distorting glasses, and to write with their nondominant hand. As they filled out the tests, Movius moved about the City of Industry classroom pounding abruptly on tables. Then came the cowbell. An aide flashed the overhead lights on and off at random. The goal was to help the deputies understand the feeling of sensory overwhelm, which many autistic people experience when incoming stimulation exceeds their capacity to process.
“So what can you do to assist somebody, or de-escalate somebody, or get information from someone who suffers from a sensory disorder?” Movius asked the rattled crowd afterward. “We can minimize sensory input. … That might be the difference between them being able to stay calm and them taking off.”
Movius, founder of the consultancy Autism Interaction Solutions, is one of a growing number of people around the U.S. working to teach law enforcement agencies to recognize autistic behaviors and ensure that encounters between neurodevelopmentally disabled people and law enforcement end safely.
She and City of Industry Mayor Cory Moss later passed out bags filled with tools donated by the city to aid interactions: a pair of noise-damping headphones to decrease auditory input, a whiteboard, a set of communication cards with words and images to point to, fidget toys to calm and distract.
“The thing about autistic behavior when it comes to law enforcement is a lot of it may look suspicious, and a lot of it may feel very disrespectful,” said Movius, who is also the parent of an autistic 25-year-old man. Responding officers, she said, “are not coming in thinking, ‘Could this be a developmentally disabled person?’ I would love for them to have that in the back of their minds.”
A sheriff’s deputy reads a pamphlet on autism during the training program.
(Genaro Molina / Los Angeles Times)
Autism spectrum disorder is a developmental condition that manifests differently in nearly every person who has it. Symptoms cluster around difficulties in communication, social interaction and sensory processing.
An autistic person stopped by police might hold the officer’s gaze intensely or not look at them at all. They may repeat a phrase from a movie, repeat the officer’s question or temporarily lose their ability to speak. They might flee.
All are common involuntary responses for an autistic person in a stressful situation, which a sudden encounter with law enforcement almost invariably is. To someone unfamiliar with the condition, all could be mistaken for intoxication, defiance or guilt.
Autism rates in the U.S. have increased nearly fivefold since the Centers for Disease Control began tracking diagnoses in 2000, a rise experts attribute to broadening diagnostic criteria and better efforts to identify children who have the condition.
The CDC now estimates that 1 in 31 U.S. 8-year-olds is autistic. In California, the rate is closer to 1 in 22 children.
As diverse as the autistic population is, people across the spectrum are more likely to be stopped by law enforcement than neurotypical peers.
About 15% of all people in the U.S. ages 18 to 24 have been stopped by police at some point in their lives, according to federal data. While the government doesn’t track encounters for disabled people specifically, a separate study found that 20% of autistic people ages 21 to 25 have been stopped, often after a report or officer observation of a person behaving unusually.
Some of these encounters have ended in tragedy.
In 2021, Los Angeles County sheriff’s deputies shot and permanently paralyzed a deaf autistic man after family members called 911 for help getting him to a hospital.
Isaias Cervantes, 25, had become distressed about a shopping trip and started pushing his mother, his family’s attorney said at the time. He resisted as two deputies attempted to handcuff him and one of the deputies shot him, according to a county report.
In 2024, Ryan Gainer’s family called 911 for support when the 15-year-old became agitated. Responding San Bernardino County sheriff‘s deputies shot and killed him outside his Apple Valley home.
Last year, police in Pocatello, Idaho, shot Victor Perez, 17, through a chain-link fence after the nonspeaking teenager did not heed their shouted commands. He died from his injuries in April.
Sheriff’s deputies take a trivia quiz using their non-writing hands, while wearing vision-distorting glasses, as Kate Movius, standing left, and Industry Mayor Cory Moss, right, ring cowbells. The idea was to help them understand the sensory overwhelm some autistic people experience.
(Genaro Molina / Los Angeles Times)
As early as 2001, the FBI published a bulletin on police officers’ need to adjust their approach when interacting with autistic people.
“Officers should not interpret an autistic individual’s failure to respond to orders or questions as a lack of cooperation or as a reason for increased force,” the bulletin stated. “They also need to recognize that individuals with autism often confess to crimes that they did not commit or may respond to the last choice in a sequence presented in a question.”
But a review of multiple studies last year by Chapman University researchers found that while up to 60% of officers have been on a call involving an autistic person, only 5% to 40% had received any training on autism.
In response, universities, nonprofits and private consultants across the U.S. have developed curricula for law enforcement on how to recognize autistic behaviors and adapt accordingly.
The primary goal, Movius told deputies at November’s training session, is to slow interactions down to the greatest extent possible. Many autistic people require additional time to process auditory input and verbal responses, particularly in unfamiliar circumstances.
If at all possible, Movius said, wait 20 seconds for a response after asking a question. It may feel unnaturally long, she acknowledged. But every additional question or instruction fired in that time — what’s your name? Did you hear me? Look at me. What’s your name? — just decreases the likelihood that a person struggling to process will be able to respond at all.
Moss’ son, Brayden, then 17, was one of several teenagers and young adults with autism who spoke or wrote statements to be read to the deputies. The diversity of their speech patterns and physical mannerisms showed the breadth of the spectrum. Some were fluently verbal, while others communicated through signs and notes.
“This population is so diverse. It is so complicated. But if there’s anything that we can show [deputies] in here that will make them stop and think, ‘Hey, what if this is autism?’ … it is saving lives,” Moss said.
Mayor Cory Moss, left, and Kate Movius hug at the end of the training program last November. Movius started Autism Interaction Solutions after her son was born with profound autism.
(Genaro Molina / Los Angeles Times)
Some disability advocates cautioned that it takes more than isolated training sessions to ensure encounters end safely.
Judy Mark, co-founder and president of the nonprofit Disability Voices United, says she trained thousands of officers on safe autism interactions but stopped after Cervantes’ shooting. She now urges families concerned about an autistic child’s safety to call an ambulance rather than law enforcement.
“I have significant concern about these training sessions,” Mark said. “People get comfort from it, and the Sheriff’s Department can check the box.”
While not a panacea, supporters argue that a brief course is better than no preparation at all. Some years ago, Movius received a letter from a man whose profoundly autistic son slipped away as the family loaded their car at the beach. He opened the unlocked door of a police vehicle, climbed into the back and began to flail in distress.
Though surprised, the officer seated at the wheel de-escalated the situation and helped the young man find his family, the father wrote to Movius. He had just been to her training.
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