Dr. Leslie Teo warns that open-source AI risks repeating the early internet's biggest mistake of assuming powerful technology will mostly be used for good: "Existential risk is real. And so is the use by humans for doing really bad harms: nuclear, biological, and others. But there are also harms like misinformation, discrimination, maybe mass surveillance." "Maybe when we set up the internet, we were naive. We thought most actors would be good. As a person who believes in open source, we…