For all the advances being made in the field, artificial intelligence still struggles when it comes to identifying hate speech. When he testified before Congress in April, Facebook CEO Mark Zuckerberg said it was “one of the hardest” problems. But, he went on, he was optimistic that “over a five- to 10-year period, we will have AI tools that can get into some of the linguistic nuances of different types of content to be more accurate in flagging things for our systems.

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