THE QUIET COST
Keep the explanation yours. × Working out an explanation asks you to retrieve what you know, put events in order, connect causes to effects, and notice where your understanding runs out. These are the actions this challenge asks you to practice.
Familiarity can hide a gap Rozenblit and Keil’s 2002 experiments included explaining a zipper. People’s confidence in their understanding of mechanisms fell after trying to explain them. Their procedure study showed a different pattern, with no significant confidence drop. Our zipper and instruction challenges therefore practice related, distinct skills.
Read Rozenblit & Keil, 2002 ↗
Generating an explanation can help learning A 2018 meta-analysis found that prompting self-explanation improved learning on average across the included studies. That supports asking you to explain before showing a reference. It does not validate this particular game or show that gains transfer to work.
Read Bisra and colleagues, 2018 ↗
AI can change how much thinking we do A 2025 survey of 319 knowledge workers linked greater confidence in AI to less reported critical thinking. Because it was a survey, it does not establish that AI caused lasting skill loss.
Read Lee and colleagues, CHI 2025 ↗
A 2026 randomized coding study found weaker unaided understanding after AI-assisted learning of a new library. It is a preprint about a specific task and short-term skill formation. It does not show that this challenge prevents decline.
Read Shen & Tamkin, 2026 preprint ↗
What the score means The percentage describes coverage of this challenge’s reference checklist. Each milestone has equal weight. In instruction challenges, a matched action earns half credit if an essential prerequisite is missing or comes later. Independent actions can change order. Mechanism challenges assess connections without imposing one writing order.
The automatic check uses phrase patterns. It can miss valid wording or accept a mistaken sentence. Review the evidence, revise your explanation, or link a missed milestone to the step where you explained it. Those corrections are labeled self-reviewed. This is a practice score, not a validated measure of intelligence, writing quality, or skill loss.