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    }
  },
  "limitations": "Exploratory follow-up on previously diagnosed data; strongest competitor selected posthoc separately in each phase. CIs descriptive without multiple-comparison correction; not blind confirmation. Same source groups across phases.",
  "conclusions": [
    "Goal-only phase means peak at U-Net read4 and Transformer read0 in all four phases.",
    "Transformer read0 versus posthoc strongest alternative paired CIs are positive for all phases and both contrasts.",
    "U-Net goal-read4 advantage CI crosses zero at80%phase; all-layout read4 versus strongest alternative CIs cross zero in every phase. No claim of universally distinct dominance."
  ],
  "next_hypothesis": {
    "question": "Does dominant U-Net read4 use image-induced FiLM scale or bias, and did the earlier bias-only SAE omit the stronger branch?",
    "architecture_reference": "https://arxiv.org/abs/1709.07871",
    "planned_controls": [
      "Verify actual ConditionalResidualBlock1D forward and scale/bias output ordering before modifying activations.",
      "Freeze original finetuned checkpoint; patch scale only, bias only, both; unchanged branch remains native.",
      "Both-branch swap must match original-condition swap at the same read, with max action error below0.002px.",
      "Paired source-group bootstrap, fresh noise seeds3356/3357; exploratory reused layouts, no blind-test or repair claim."
    ],
    "execution": "NOT RUN: remote SSH resets connection. This analysis used existing completed samples only."
  }
}