Right for the Wrong Reasons: Epistemic Regret Minimization for Causal Rung Collapse in LLMs

Researchers identify a fundamental flaw in large language models called 'Rung Collapse' where AI systems achieve correct answers through flawed causal reasoning that fails under distribution shifts. They propose Epistemic Regret Minimization (ERM) as a solution that penalizes incorrect reasoning processes independently of task success, showing 53-59% recovery of reasoning errors in experiments across six frontier LLMs.