What keeps an Apple developer up at night? Meet Carlos Guestrin — decorated professor of Computer Science at Stanford and former Senior Director of AI and Machine Learning at Apple. Carlos talks with Data Wranglers Joe Hellerstein and Jeffrey Heer about the birth of the AI-driven Face ID and other machine-learning features he and his team created at Apple. He also talks about distribution shifts and what kept him up at night: the “unknown unknowns” about data, privacy and user experiences. #TheDataWranglers