Version history — Problem Solving¶
Current edition: v2 · 2026-09-28 · prime abstraction
Editions¶
| Version | Date | Change | What changed |
|---|---|---|---|
| v2 | 2026-09-28 | Added the plain-language explanation ladder: age-graded explanations of the idea, from an explain-like-I'm-five version up to a specialist one. | structure — eli ladder (added) |
| v1 | 2026-09-28 | First edition. Problem Solving joins the encyclopedia as a new prime abstraction, originating in Psychology & Behavioral Sciences — one of 41 primes and 3,484 domain-specific abstractions added in this release. | first published edition |
Editions are cut at publish time from a content hash of the entity's canonical source, so a version changes only when the content actually changed. Full canonical content for every edition, and the exact per-part diffs between them, are in the downloadable editions archive (editions_archive.jsonl); the current-state index is versions.jsonl.