Reasoning or Fluency? Dissecting Probabilistic Confidence in Best-of-N Selection
Researchers have found that probabilistic confidence metrics, commonly used to evaluate reasoning quality in AI models, may not accurately reflect true reasoning capabilities. Their experiments show that these metrics are largely insensitive to logical structure and instead capture surface-level fluency or prior knowledge. To address this, the team developed a new contrastive causality metric designed to better isolate and measure inter-step causal dependencies in reasoning. AI
IMPACT Current AI reasoning evaluation metrics may be flawed, suggesting a need for more robust methods to assess true logical capabilities.