METHODOLOGY

How the evidence was reviewed.

This is an early version. AI assistants, not independent experts, checked each explanation against its research papers, official guidance, reference material, public data, provenance records and licence terms.

What the review did

Each link shows the source, the limit of the claim or how the material may be reused. Each claim we publish records its supported wording, evidence limits, review date and review status. Puzzle stories keep the puzzle separate from the research idea it illustrates.

What the review could not check

No independent expert has reviewed the games, learning pages or questionnaire presentation yet. Browser checks cannot tell us whether people understand it, whether the questionnaire works well, or how it behaves on every device and screen reader.

How to read a result

A round’s result shows how that round went. Your level comes from your recent answers to new puzzles across rounds, the easy first ones included, so one strong round moves it only a little; a puzzle you have met before counts for its round but never for your level. How to read your results