Facebook kicked off the second day of F8 2019, its annual developers conference, with a keynote about the technologies it uses to combat abuse on its platform. As the company detailed last year, artificial intelligence is key to keeping its apps and services safe. Facebook says AI is now proactively taking down more than 99 percent of spam, fake accounts and terrorist propaganda, though it’s still struggling with hate speech (51.6 percent) and harassment (14.9 percent). Another area where Facebook is looking to improve the technology is inclusivity. What that means, essentially, is that it wants to teach its machines to work the same for everyone, regardless of skin color or other physical attributes.