Margaret Mitchell

American computer scientist working on AI ethics and natural language generation. After a PhD at the University of Aberdeen on generating descriptions of objects, and research at Microsoft on systems that describe images, she joined Google in 2016, founded its Ethical AI team and co-led it with Timnit GebruTimnit Gebru, prop. n.: An Ethiopian-born American computer scientist who exposed racial and gender bias in AI systems, co-wrote the 'stochastic parrots' paper, and founded an independent AI research institute.. She was lead author of 'Model Cards for Model Reporting' (2019), which proposed model cardsmodel card, n.: A short document published with an AI model explaining what it is for, how it was trained and tested, how well it works for different groups of people, and its known limits., short standardized documents describing a model's intended uses, performance across demographic groups and limitations, a practice later extended into system cardssystem card, n.: A public report released with an AI model that explains what it can do, how it was tested for safety, what risks were found and what protections were put in place.. She co-wrote the 2021 paper that coined 'stochastic parrotsstochastic parrot, n.: A critical label for AI language systems, likening them to parrots that echo patterns in the text they were trained on, fluently but with no grasp of what the words mean.', listed under the pseudonym Shmargaret Shmitchell after Google objected to the paper. Google fired her in February 2021, saying she had violated its code of conduct and security policies; she had been searching her work files for evidence about Gebru's treatment. She then joined Hugging FaceHugging Face, prop. n.: A company whose website is the main public library for sharing AI models and datasets — often called the GitHub of machine learning — and which makes widely used free AI software. as its chief ethics scientist.