arXiv Machine Learning By Areeb Ahmad, Pratinav Seth, Vinay Kumar Sankarapu

Every Ablation Is a Dose: Counterweights and the Semblance of Self-Repair

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The paper investigates the phenomenon of self‑repair in language models, proposing that it arises from a pre‑existing gain in components that act as counterweights when a component is ablated. By modeling interventions as points on a counterfactual axis, the authors derive an affine law for the causal repair response of fine‑grained units, showing that most downstream directions across several models follow this law. They further demonstrate that the slope of this law can be predicted from fixed weights, suggesting that self‑repair is a predictable, counterweight‑driven response rather than a noisy, unexplained effect.

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