ReRoute: physics-informed fine-tuning cuts counterfactual error up to 89.6%

AnimaAnandkumar · x · 2026-10-14

Anima Anandkumar's team introduced ReRoute, a framework for scientific counterfactual prediction. It combines observational data with partial physical knowledge to predict unseen interventions without new experiments: known physical mechanisms guide pretrained models via lightweight fine-tuning. Results: up to 31.8% lower prediction error under severe CO₂ distribution shifts in climate emulators, and up to 89.6% lower counterfactual error in advection–diffusion experiments — with no new intervention data or retraining from scratch.

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