In November 2022, any residual feeling that Silicon Valley represented a clear-cut boon for humanity vanished like a fart in the wind. In an act of breathtaking arrogance, OpenAI released GPT-3.5, a free preview of its chatbot ChatGPT. Confronted with a technology that could synthesise humanlike text in response to prompts from actual humans, journalists and commentators rushed into print to weigh its likely implications, often using the chatbot itself to generate the first few paragraphs of their articles (which is a bit like a caveman ostentatiously sporting a bronze medallion towards the end of the Stone Age) ...