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Facebook Steps Toward Cryptocurrencies

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The limited pilot will be restricted to 200,000 users in the US and Guatemala. F2's Marcus has said the company plans is instead to use free person-to-person transfers to build up its user base, before branching out to become a more general payment provider and making money on merchant fees.

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How Duolingo’s AI Learns What You Need to Learn

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But from the learner’s perspective, it simply feels as though the green owl is getting better and better at personalizing lessons. But as immigrants themselves (from Guatemala and Switzerland, respectively), they recognized that not everyone has access to great teachers. Duolingo then doubled down on building personalized systems.

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