Microsoft’s CEO Satya Nadella is spreading his artificial intelligence bets around, beyond the company’s partnership with OpenAI. WSJ reporter Tom Dotan joins host Zoe Thomas to explain how Nadella is doing this and how it’s being received inside Microsoft. Plus, the language learning app Duolingo is winning the battle for users' attention. WSJ columnist Ben Cohen talks about how it’s using perfectly timed notifications to do this.

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