In "Why do we take notes?", Juha-Matti Santala explores the value of note-taking in an age dominated by LLMs. Emphasizing that notes are tools for understanding rather than mere representations of information, he argues that the cognitive process involved in transforming source material into one's own thoughts leads to deeper learning. He discusses the benefits of maintaining personal notes, connecting ideas, and testing one's knowledge through writing, ultimately asserting that the act of note-taking enhances both retention and comprehension of information.