Elon Musk, a prominent US entrepreneur, has asked a US court to stop the "illegal" transformation of OpenAI, the US research centre for open artificial intelligence, into a for-profit enterprise. An OpenAI spokesperson said Mr. Musk's application was "duplicative and remains unfounded". In February, Mr. Musk filed a lawsuit claiming that he had agreed with two of the company's co-founders to make OpenAI a "non-profit organisation" when he provided funding and other support for the company's foun...