Deliberative Reasoning Network: An Uncertainty-Driven Paradigm for Belief-Tracked Inference with Pretrained Language Models

• URL: http://arxiv.org/abs/2508.04339v1
• Date: Wed, 06 Aug 2025 11:33:35 GMT
• Title: Deliberative Reasoning Network: An Uncertainty-Driven Paradigm for Belief-Tracked Inference with Pretrained Language Models
• Authors: Anran Xu, Jincheng Wang, Baigen Cai, Tao Wen,
• Abstract summary: Deliberative Reasoning Network (DRN) is a novel paradigm that reframes logical reasoning from probability to uncertainty minimization.<n>DRN achieves intrinsic interpretability by explicitly tracking belief states and quantifying uncertainty for competing hypotheses.<n>We position DRN as a foundational, verifiable System 2 reasoning component for building more trustworthy AI systems.
• Score: 7.095344389368656
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Large language models often fail at logical reasoning when semantic heuristics conflict with decisive evidence - a phenomenon we term cognitive traps. To address this fundamental limitation, we introduce the Deliberative Reasoning Network (DRN), a novel paradigm that reframes logical reasoning from probability maximization to uncertainty minimization. Instead of asking "Which answer is most likely?", DRN asks "Which hypothesis has the most internally consistent evidence?". DRN achieves intrinsic interpretability by explicitly tracking belief states and quantifying epistemic uncertainty for competing hypotheses through an iterative evidence synthesis process. We validate our approach through two complementary architectures - a bespoke discriminative model that embodies the core uncertainty minimization principle, and a lightweight verification module that enhances existing generative LLMs. Evaluated on LCR-1000, our new adversarial reasoning benchmark designed to expose cognitive traps, the bespoke DRN achieves up to 15.2% improvement over standard baselines. When integrated as a parameter-efficient verifier with Mistral-7B, our hybrid system boosts accuracy from 20% to 80% on the most challenging problems. Critically, DRN demonstrates strong zero-shot generalization, improving TruthfulQA performance by 23.6% without additional training, indicating that uncertainty-driven deliberation learns transferable reasoning principles. We position DRN as a foundational, verifiable System 2 reasoning component for building more trustworthy AI systems.

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