🤖 AI Summary
To address the challenges of ambiguous user stances and insufficient coupling between sentiment and logical reasoning in misinformation propagation, this paper proposes a sentiment-aware stance detection method. Methodologically, we design a BERT-based dual-channel encoder, incorporating an emotion-gated cross-attention mechanism and a sentiment–stance label fusion strategy to enable fine-grained sentiment-guided stance classification; we further introduce a multi-label consistency fusion module and adversarial emotion-augmented training to enhance model robustness. On FakeNewsNet and PStance benchmarks, our approach achieves absolute F1-score improvements of 4.2% and 3.8%, respectively, and reduces sentiment-related error rates by 21%, significantly improving detection accuracy for ironic, implicit, and polarized stances. The core contribution lies in the first joint optimization of dynamic emotion modeling and argument structure, overcoming the longstanding limitation in conventional stance detection—namely, the semantic and inferential decoupling between sentiment and logical reasoning.