BREAKING: Sequoia (@sequoia) leading the largest European seed round of all time with $1B at $4B valuation. David Silver, one of Britain’s top AI researchers, left Google DeepMind late last year to launch the London-based start-up Ineffable Intelligence. He aims to build “superhuman intelligence”. Sequoia partners Alfred Lin and Sonya Huang flew to London to visit Silver after his departure, who is also a professor at University College London.