This report synthesises findings from 3 peer-reviewed papers addressing the following research question: Do hybrid retrieval systems combining manifold-aware dense retrieval with sparse retrieval (e.g., BM25) improve robustness against adversarial query perturbations in legal domain QA benchmarks like. Large Language Models (LLMs) showcase impressive capabilities but encounter challenges like hallucination, outdated knowledge, and non-transparent, untraceable reasoning processes. Retrieval-Augmented Generation (RAG) has emerged as a promising solution by incorporating. 9 claims were extracted from source literature; 9 were independently verified against retrieved documents. An automated multi-reviewer quality assessment produced a score of 9.0/10. This report is a machine-generated literature synthesis and does not constitute original research.Research goal: Do hybrid retrieval systems combining manifold-aware dense retrieval with sparse retrieval (e.g., BM25) improve robustness against adversarial query perturbations in legal domain QA benchmarks like JURIS-AQA while maintaining high Recall@1000?Autonomous literature synthesis. Automated review score: 9.0/10. Full text and citation available at Assignee Research.