At the time of the announcement, conservatives sounded the alarm about how some of the fact-checkers they're using are left-wing hacks like PolitiFact and Snopes (who recently, with straight faces, fact-checked a piece of satire from The Babylon Bee).
A recent warning that accompanied an article I wrote for PJM highlights the fallibility of Facebook's fact-checking program.
Why a Canadian outfit is fact-checking U.S. news is anyone's guess, but they clearly flagged my article in error. [It was brought to my attention after this article was published that AFP Canada is part of France's state-run Agence France-Presse, so let me rephrase that question: Why has Facebook chosen a state-run French news outlet to fact-check U.S. news?]