Premise-Augmented Reasoning Chains Improve Error Identification in Math reasoning with LLMs

TL;DR

This paper introduces Premise-Augmented Reasoning Chains (PARC), a novel framework that enhances error detection in LLMs' mathematical reasoning by explicitly linking reasoning steps to their premises, improving verification accuracy.

Contribution

The paper presents PARC, a premise-centric reasoning structure that improves premise identification and error detection in LLM-generated mathematical reasoning chains.

Findings

LLMs can identify premises with 90% recall in complex chains.

PARC improves error detection accuracy by 6-16%.

PARC enables more reliable reasoning evaluation.

Abstract

Chain-of-Thought (CoT) prompting enhances mathematical reasoning in large language models (LLMs) by enabling detailed step-by-step solutions. However, due to the verbosity of LLMs, the resulting reasoning chains can be long, making it harder to verify the reasoning steps and trace issues resulting from dependencies between the steps that may be farther away in the sequence of steps. Importantly, mathematical reasoning allows each step to be derived from a small set of premises, which are a subset of the preceding steps in the reasoning chain. In this paper, we present a framework that identifies the premises for each step, to improve the evaluation of reasoning. We restructure conventional linear reasoning chains into Premise Augmented Reasoning Chains (PARC) by introducing premise links, resulting in a directed acyclic graph where the nodes are the steps and the edges are the premise links. Through experiments with a PARC-based dataset that we built, namely PERL (Premises and ERrors identification in LLMs), we demonstrate that LLMs can reliably identify premises within complex reasoning chains. In particular, even open-source LLMs achieve 90% recall in premise identification. We also show that PARC helps to identify errors in reasoning chains more reliably. The accuracy of error identification improves by 6% to 16% absolute when step-by-step verification is carried out in PARC under the premises. Our findings highlight the utility of premise-centric representations in addressing complex problem-solving tasks and open new avenues for improving the reliability of LLM-based reasoning evaluations.