Maybe it's author Michael "Fire and Fury" Wolff hinting that President Donald Trump is having an affair with United Nations Ambassador Nikki Haley.
Maybe it's the waves of lies from Russian hackers that have flooded major social-media sites, causing global confusion and chaos.
Maybe it's rumors that Pope Francis has a brain tumor or that he's preparing for a Third Vatican Council, one sure to split the Church of Rome.
Whatever "fake news" is, the pope's World Communications Day message made it clear that he believes Satan is behind it all, whether journalists and mass-media leaders know it or not.
"We need to unmask what could be called the 'snake-tactics' used by those who disguise themselves in order to strike at any time and place," wrote the pope. "This was the strategy employed by the 'crafty serpent' in the Book of Genesis, who, at the dawn of humanity, created the first fake news, which began the tragic history of human sin."
The pope released this text on Jan. 24, the feast of St. Francis de Sales -- the patron saint of journalists -- even though World Communications Day will be on May 13. The "fake news" hook is in the title: " 'The truth will set you free.' Fake news and journalism for peace."
The problem is that few people -- especially in culture-wars America -- agree on what "fake news" means. It's hard to imagine a more partisan term, when President Donald Trump shouts it at a rally. Meanwhile, many journalists have downplayed Gallup polls showing that public trust in the news media is lower than ever.
Concerning the crucial definition issue, Pope Francis wrote: