Notes from a talk at the ARC Prize conference by @kenneth0stanley, co-author of "Why Greatness Cannot Be Planned," on the challenges of measuring open-endedness: --- Stanley argued that sustained invention and discovery are essential to AGI, but designing a benchmark for them creates difficult problems. A poorly chosen measure could steer research away from the discoveries we hope to encourage. He offered no finished benchmark. His talk examined existing approaches, their limitations, and a…