Facebook has taken a step closer to the border between between human and AI interactions.
According to New Scientist, the social network’s AI lab directed a bot to watch hundreds of Skype conversations from Youtube to analyze subtle facial expressions—then try to respond to them.
The bot is said to be able to “tilt its head” or “open its mouth” while viewing video of a human laughing.
A volunteer panel judged the bot and deemed it “qualitatively realistic,” presumably while their mouths hung open. 
