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It was over a swanky lunch in Mayfair in 2013 that a local venture capital investor reality-checked the ambitions of what was once Europe’s most important AI company. In between bites of Cantonese cuisine, the founders of DeepMind were telling their backer about their plans to change the world with AI models that were smarter than humans. Chief Executive Officer Demis Hassabis and co-founder Mustafa Suleyman mentioned they’d just come back from Mountain View, California, where they’d rejected ...

