The best way to learn to spot a conspiracy theory is to make one yourself.
Pick a real news story. On the next step you'll choose who's behind it and why. Then walk through the four moves real conspiracists use, with a debunk on every step.
Choose whichever real-feeling headline your imagination will run wildest with. Don't overthink it.

Spain's annual Tomatina festival draws thousands each year to the town of Buñol, where participants playfully pelt one another with overripe tomatoes. This year about 15,000 people, many tourists, threw roughly 120 tonnes of fruit, turning streets and buildings into red pulp. The event lasts about an hour, and people commonly wear goggles and old clothes; there is a small participation fee of about €12 to help manage the crowd.

William Friedkin’s 1977 film Sorcerer is a tense thriller about four desperate men hired to transport highly unstable explosives across dangerous, remote roads. Inspired by Georges Arnaud’s novel and echoing the earlier French film The Wages of Fear, Sorcerer aimed for a raw, realistic tone. Friedkin, fresh from the success of The Exorcist, pushed for authentic locations and intense performances to heighten the film’s unrelenting atmosphere.

A 40-year-old British doctor touring South Africa was shot and killed in Cape Town after turning into Ntlangano Crescent during violent street protests, authorities said. The incident occurred last Thursday when the general practitioner took a different route after leaving the airport. Multiple unidentified suspects confronted him and opened fire; he did not survive. South African police confirmed the death and said they were investigating the circumstances and seeking the attackers.

Researchers report that reef-dwelling hogfish have light-sensitive cells embedded in their skin, allowing the animals to sense brightness and adjust their colour without relying solely on eyes. The study, published in Nature, shows this skin-based photoreception can continue to influence colour change even after death. Hogfish live in Atlantic reefs and can shift hues in milliseconds. Those rapid changes aid camouflage, social signalling and may help with temperature regulation and attracting mates.