Version history — Necessity and Sufficiency¶

Current edition: v3 · 2026-09-28 · prime abstraction

Editions¶

Version	Date	Change	What changed
v3	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)
v2	2026-09-28	The structural–framed grading was recomputed and confirmed at the structural end, with a revised rationale. The prose on its placement was rewritten to explain the relation as implication read in two directions and why it reads structural on every diagnostic.	prose — detailed body (prose edited) · structure — grading (fields changed)
v1	2026-08-30	First publish of the new-abstractions-1 wave: 1,932 domain-specific abstractions and 19 primes.	first published edition

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