Last week Roseanne Barr — who, with the hit reboot of her show, has become one of the most prominent Donald Trump supporters in the country — tweeted that the president has freed hundreds of children a month from sexual bondage. “He has broken up trafficking rings in high places everywhere,” she wrote. (The tweet has since been deleted.)

Barr’s tweet, puzzling to the casual observer, was a reference to QAnon, an expansive, complicated pro-Trump conspiracy theory. The theory is fascinating as an artifact of our current political derangement, but more than that, it’s profoundly revealing about the lengths to which some Trump supporters will go to convince themselves that his presidency is going well.

As Paris Martineau explained in New York Magazine, QAnon was born last October, when someone claiming to have “Q” level security clearance started a cryptic thread on 4chan, the online message board and troll playground. It was titled, “The Calm Before the Storm,” a phrase Trump had recently used. Q posted hints, some in the form of questions, ostensibly meant to help clued-in Trump supporters understand what was really going on in Washington beneath the facade of chaos and incompetence. (“What is military intelligence? Why go around the 3 letter agencies?”)

From these clues, a sprawling community on message boards, YouTube videos and Twitter accounts has elaborated an enormous, ever-mutating fantasy narrative about the Trump presidency. In the QAnon reality, Trump only pretended to collude with Russia in order to create a pretext for the hiring of Robert Mueller, the special counsel, who is actually working with Trump to take down an inconceivably evil and powerful network of coup-plotters and child sex traffickers that includes Hillary Clinton, Barack Obama and George Soros.