If you want to make a really big AI model — the kind that can generate images or do your homework, or build this website, or fake a moon landing — you start by finding a really big training set. Images and words, harvested by the billions from the internet, material to build the world that your AI model will reflect back to you. What this training set contains is extremely important. More than any other thing, it will influence what your model can do and how well it does it.Yet few people in the...