# Stop answer-identical 4B arms; reopen the deep tier as the primary quality lever

> Living preprint · as of 2026-10-25 · map node D-039 (decision) · interim record, not a final result.

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- [D-039] 2026-10-06 · Stop answer-identical 4B arms; reopen the deep tier as the primary quality lever · why: 15 arms, 0 ratio movement. · status: kept

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## Outgoing

- led to: [X-085] DEEPTHINK: DEEPTHINK (the deep tier reopened as the quality lever) → https://r4topunk.github.io/boar-research/map/x-085.md

Read chapter 6, The deep tier: https://r4topunk.github.io/boar-research/research/deep-tier.md

## Facts cited {#facts}

Resolve every [F-…] marker in https://r4topunk.github.io/boar-research/data/facts.json. Each line gives the claim, the number with its metric family, set and status, judge, n, seeds, CI, date and caveat.

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- [F-576] Stop answer-identical 4B arms; reopen the deep tier as the primary quality lever — why: 15 arms, 0 ratio movement — outcome: deep-tier line ran 10-07 → 10-10. · date 2026-10-06

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Cite as: r4to, independent researcher. RatLab — A Boar Research (2026), research record 1.0, as of 2026-10-25. Text and data CC BY 4.0. Fact ids or a link must travel with a quote. How to cite: https://r4topunk.github.io/boar-research/cite/ · https://r4topunk.github.io/boar-research/CITATION.cff.

AI-reviewed, not clinically reviewed. Nothing here is medical advice.