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.

China’s state-run Global Times published an editorial urging the British Museum to return Chinese artifacts just ahead of a visit by UK Foreign Secretary James Cleverly. The piece accused the museum of holding items acquired through improper channels and called some pieces “stolen.” The British Museum’s collection includes more than 23,000 Chinese objects, and the editorial named examples such as the painting The Admonitions of the Instructress to the Court Ladies and Liao tri-coloured luohan statues.

In 2009 the Large Hadron Collider (LHC), a giant particle accelerator near Geneva run by CERN, was preparing to restart after upgrades. Scientists said the machine would smash protons together at very high energies to study fundamental particles and forces, potentially revealing phenomena such as the Higgs boson or signs of new physics. However, some members of the public expressed fear that the machine could produce catastrophic effects, including miniature black holes or other unknown dangers.

Google is expanding a tool called "Results about you," first introduced last year to help people remove personal information from Search results. The new version will actively scan the public web for instances of a user’s personal data and send alerts so they can request removal. Google says the feature is currently available in the United States in English and will be rolled out to more regions over time.

Brazil reported a major fall in Amazon deforestation in July: official figures say tree-clearing and burning dropped about 60 percent compared with the same month last year. The government and the environment minister attribute the decline to political changes and new administration policies, based on national monitoring systems. Scientists caution this reflects a single month and that short-term figures can be influenced by seasonal and reporting factors.