The Turing Test thing was my first reaction also. These are sites consciously imitating the stylistic markers of real news, where the only signal for falsifica

The Turing Test thing was my first reaction also. These are sites consciously imitating the stylistic markers of real news, where the only signal for falsification is the content of the story. They regularly fool real people - sometimes because The Onion's sarcasm slips past someone, sometimes because the piece is 100% plausible, yet false. Facebook could save itself some predictable pain by blacklisting The Onion and SportsPickle and other high-profile fake news sites, but they aren't going to be able to crack this problem with algorithms (or if they do, those algorithms will have far better uses).