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.

Scientists have identified Burgessomedusa phasmiformis as the oldest known swimming jellyfish, based on fossil specimens recovered from the Burgess Shale in Canada. These animals lived more than 500 million years ago during the Cambrian period. Researchers classify them as medusozoans, the group that includes modern jellyfish, and say the fossils provide direct evidence that jellyfish-like animals had already evolved by that time.

As clocks move forward each spring across the northern hemisphere, debates over daylight saving time continue in several Western European countries. YouGov's Eurotrack survey asked people in Britain, Denmark, France, Germany, Italy, Spain and Sweden whether their country should stop switching clocks twice a year. Responses vary widely: 75% of Germans want to end the practice, while Italy is the only country where a majority (56%) prefers to keep changing the clocks. Britain and Spain were narrowly divided on the question.

A Kansas judge has ordered authorities to delete all electronic copies made from files seized during a police search of the Marion County Record, a small local newspaper. The searches, carried out nearly two weeks earlier, removed computers and cellphones from the paper’s office. The court order requires that digital copies created from those devices be destroyed, limiting how officials may keep and use material gathered in the raid.

Researchers presented new findings at the European Society of Cardiology meeting showing that laughter therapy can improve some measures of heart health in people with coronary artery disease. In the study, patients took part in guided laughter sessions while researchers measured inflammation markers and cardiovascular performance before and after. The reported results included lower inflammation and improved indicators of heart function after the laughter interventions.