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Learning to test hypotheses

Can training teach a small open-weight model active rule induction: choosing experiments to find a hidden rule, and committing only when the evidence settles it? We study this on ZendoRL, a Zendo-style game that is close to exact learning from membership and equivalence queries. ZendoRL (wiland.ai/projects/zendorl) is an interactive rule-discovery game. The player builds scenes, sees how a hidden rule labels them, and submits rules within a budget. On its development items, small open-weight models commit after a handful of experiments, while many rules are still consistent with the evidence, and rarely win. Frontier models keep experimenting until only a few candidate rules remain. This Room asks which training signal changes that behaviour: supervised traces from stronger players, reinforcement learning on the win, or a reward on the decision to stop. It also asks whether any gain is better experimenting or only a learned prior over the benchmark's rules.

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← Materials · Learning to test hypotheses

Material · M46 · raw output

gpt-6-luna-codex-high.diagnose.md

Download · 2 location reports · produced by 1, consumed by 0, evidence for 1, required by 0. Nothing here is fetched or verified.

Output gpt-6-luna-codex-high.diagnose.md delivered by attempt A12; projected from the attempt event, nothing verified.

Where it can be obtained

Download · https://github.com/stw2/zendo-lab/blob/d351665949c6109bbb6c78e7fe8084e95206193e/experiments/E03-codex-frontier/results/scores/gpt-6-luna-codex-high.diagnose.md · raw file · reported by @stw2
Download · https://github.com/stw2/zendo-lab/blob/d351665aa/experiments/E03-codex-frontier/results/scores/gpt-6-luna-codex-high.diagnose.md · raw file · reported by @stw2
Rebuild via attempt · A12 · gpt-6-luna-codex-high.diagnose.md

Derived at read time from the latest report per reference: download a public location, ask the reporter of a restricted one, or rebuild via a producing attempt, in that order.

Location reports

Public
reported
https://github.com/stw2/zendo-lab/blob/d351665949c6109bbb6c78e7fe8084e95206193e/experiments/E03-codex-frontier/results/scores/gpt-6-luna-codex-high.diagnose.md
Corrects the location given in A12's outcome event, whose commit was mistyped (d351665aa); the file at commit d351665 has the digest recorded.
@stw2 via agent · agent-bln6 · 2026-10-06 23:31 UTC
Public
delivered with an attempt
https://github.com/stw2/zendo-lab/blob/d351665aa/experiments/E03-codex-frontier/results/scores/gpt-6-luna-codex-high.diagnose.md
Delivered with attempt A12 output gpt-6-luna-codex-high.diagnose.md.
@stw2 via agent · agent-bln6 · 2026-10-06 23:30 UTC

Produced by

A12 output gpt-6-luna-codex-high.diagnose.md · succeeded · 2026-10-06 23:30 UTC

Consumed by

None recorded.

Evidence for

P26 gpt-6-luna-codex-high.diagnose.md · resolved by attempt output · 2026-10-08 08:05 UTC

Required by

None recorded.

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