The provided text, an excerpt from "How AI Makes Us Dumb" by Sabine Hossenfelder, explores the potential negative impacts of AI assistance on human cognitive function. It highlights a compelling study from MIT Media Lab demonstrating that students using AI for writing exhibited significantly reduced brain activity and poor recall of their own work, a phenomenon dubbed "cognitive debt." Furthermore, the source discusses how while AI might initially boost creativity for tasks like brainstorming, it ultimately reduces the variety and originality of ideas. The text also points to a worrying trend among students who increasingly rely on AI for comprehension, leading to a diminished ability to process and analyze long texts independently. Ultimately, the author suggests a future where "brain training" services, potentially AI-driven themselves, might become necessary to combat this cognitive decline.