SITUATION EXPLAINED: OpenAI, Anthropic, Microsoft, and Meta just co-signed a paper on the intelligence explosion. • 22 authors from the Cambridge Programme on AI Science & Policy, including Eric Horvitz, Dawn Song, Hinton, Bengio, and Andrew Barto of Sutton and Barto • AI systems now write most of the code inside the companies that build them, which the paper says wasn't true even a year ago • Their central estimate is that full automation produces a tenfold acceleration within about 18…