One particular rumor went viral, gaining millions of views, claiming this: If you click the "like" button in the shape of a heart underneath tweets, the button would change into an "X".

Not long after inaccurate news stories informed Facebook users they'd soon be getting access to a Dislike button, a number of links resembling the example reproduced above and touting the Dislike ...

When Safety Check is accessed by way of the new button, you’ll be able to view a feed of disasters, updates from friends who marked themselves as safe and offers of help.

From our experiments, the double-check button reinforced some statements but did not always catch logical flaws in its output. Upon using Bard now, you'll see an explanation of how double-check works.