The paper/article this refers to has more context. Lots of nice diagrams! <a href="https://transformer-circuits.pub/2022/toy_model/index.html" rel="nofollow">https://transformer-circuits.pub/2022/toy_model/index.html</a>.
I really love the work in this series, it feels like they are getting close to uncovering a periodic table of features/concepts that are common across all models.