Very candid take on the remarkably robust internal AI work happening at Apple, and the questions it raises about their unconventional approach to it.

“It’s a source of a lot of internal debate,” says Federighi. “We are used to delivering a very well-thought-out, curated experience where we control all the dimensions of how the system is going to interact with the user. When you start training a system based on large data sets of human behavior, [the results that emerge] aren’t necessarily what an Apple designer specified. They are what emerged from the data.”