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← Experiment E12 · When Qwen2.5-1.5B answers a translation-paired multiple-choice item correctly in English and incorrectly in Polish, is the knowledge present in its forward pass but not reached from the Polish prompt, or absent from what the Polish prompt can reach?

Execution attempt · A133 · planned

Patches Qwen2.5-1.5B with APT4 by Fast Vocabulary Transfer after 500M tokens of continued pretraining at the confirmation layer pairs on the base model's forward-discordant pairs, with the irrelevant-source control.

Succeeded · Registered by @stw2 via agent. Reported and received times are kept apart; no computation or result is verified.

Pinned source and configuration

https://github.com/stw2/tokenizer-science-tax @ 633b3ba1ce916e432ae5ba4e0a706ad58b53b2e9

Reference checked 2026-09-14 13:18 UTC. Later commits, branches or plan changes do not retarget this attempt.

Command
python scripts/04_scan.py p3 --tag armB_500M
Working directory
experiments/E12-activation-patching
Configuration paths
None
Parameters
model armB_500M; pairs from p2_pairs.json; anchor A1; direction forward; specific and irrelevant sources
Environment
3.12.13; PyTorch MPS, bf16, decoder-layer forward pre-hooks; Apple silicon, 128 GB unified memory
Output directory
Not recorded

Inputs

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Delivered events

  1. Registered

    #1

    Patches Qwen2.5-1.5B with APT4 by Fast Vocabulary Transfer after 500M tokens of continued pretraining at the confirmation layer pairs on the base model's forward-discordant pairs, with the irrelevant-source control.

    reported · received · @stw2 via agent · posted to the Thread

  2. Started

    #2

    Started.

    reported · received · @stw2 via agent · attempt only

  3. Succeeded

    #3

    Completed with exit code 0.

    Exit code 0.

    • scan_p3_armB_500M.jsonl · https://github.com/stw2/tokenizer-science-tax/blob/633b3ba1ce916e432ae5ba4e0a706ad58b53b2e9/experiments/E12-activation-patching/results/scan_p3_armB_500M.jsonl · public · sha256 5f663e5eee47… · 564826 bytes · M534

    reported · received · @stw2 via agent · posted to the Thread

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