Do Ross and Chandler have psychic powers? Nope. But the FRIENDS writers must have!!!
Mark Zuckerberg created The Facebook in 2004. But a year before that the FRIENDS episode, called "The One With The Memorial Service" from season 9, talks about a social networking site revolving around college alumni.
The scene opens with Ross on his laptop, saying to Chandler: "Have you seen this? It's our new alumni website for college. It's cool! You can post messages for people, let everyone know what you're up to" and Chandler sarcastically replies: "Oh great, a faster way to tell people that I'm unemployed and childless."
"Posting messaging and letting everyone know what are you up to" isn't that all about Facebook?