Facebook launches Siri rival...with real humans

Facebook (NASDAQ: FB) has launched its own personal digital assistant within its Messenger app in a bid to challenge Apple's (NASDAQ: AAPL) Siri, Google (NASDAQ: GOOGL) Now and Microsoft's Cortana. But Facebook's proposition, called "M," comes with a difference. Instead of being purely based on artificial intelligence (AI), it also uses real people - almost like customer service ...