Every year, those of us who graduated from our medical school in a particular year set meet in different parts of the world for reunions, and occasionally we have an international reunion. This year's meeting was in Toronto, Canada, and I was asked to give a virtual presentation. I have given presentations at previous reunions and usually try to make them light, enjoyable and memorable. I intended to do the same this year, especially since I spoke about AI and its dangers at a previous meeting. However, as I prepared this presentation, something had changed. The people developing AI—including senior executives and researchers in the technology industry—were increasingly issuing warnings. Various whistleblowers, as if on cue, were warning about the dangers of AI and the need for strict, enforceable regulations and guidelines. Researchers in the technology industry were increasingly warning about its potential risks. Some have even suggested that sufficiently advanced AI could pose ...