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This paper introduces a comprehensive system for detecting hallucinations in large language model (LLM) outputs in enterprise settings. We present a novel taxonomy of LLM responses specific to hallucination in enterprise applications,…

Computation and Language · Computer Science 2025-04-10 Bibek Paudel , Alexander Lyzhov , Preetam Joshi , Puneet Anand

Large language model (LLM) has achieved outstanding performance on various downstream tasks with its powerful natural language understanding and zero-shot capability, but LLM still suffers from knowledge limitation. Especially in scenarios…

Computation and Language · Computer Science 2024-08-07 Tiezheng Guo , Qingwen Yang , Chen Wang , Yanyi Liu , Pan Li , Jiawei Tang , Dapeng Li , Yingyou Wen

Large language models (LLMs) have achieved remarkable success across a wide range of applications especially when augmented by external knowledge through retrieval-augmented generation (RAG). Despite their widespread adoption, recent…

Computation and Language · Computer Science 2026-04-14 Tianzhe Zhao , Jiaoyan Chen , Shuxiu Zhang , Haiping Zhu , Qika Lin , Jun Liu

Ensuring large language model (LLM) reliability requires distinguishing objective unsolvability (inherent contradictions) from subjective capability limitations (tasks exceeding model competence). Current LLMs often conflate these…

Computation and Language · Computer Science 2026-02-03 Dengyun Peng , Qiguang Chen , Bofei Liu , Jiannan Guan , Libo Qin , Zheng Yan , Jinhao Liu , Jianshu Zhang , Wanxiang Che

Recent works integrating Knowledge Graphs (KGs) have shown promising improvements in enhancing the reasoning capabilities of Large Language Models (LLMs). However, existing benchmarks primarily focus on closed-ended tasks, leaving a gap in…

Computation and Language · Computer Science 2025-05-23 Yuan Sui , Yufei He , Zifeng Ding , Bryan Hooi

Large Language Models (LLMs) have exhibited impressive proficiency in various natural language processing (NLP) tasks, which involve increasingly complex reasoning. Knowledge reasoning, a primary type of reasoning, aims at deriving new…

Computation and Language · Computer Science 2024-07-02 Yifei Zhang , Xintao Wang , Jiaqing Liang , Sirui Xia , Lida Chen , Yanghua Xiao

Retrieval-augmented language models (RALMs) represent a substantial advancement in the capabilities of large language models, notably in reducing factual hallucination by leveraging external knowledge sources. However, the reliability of…

Computation and Language · Computer Science 2024-10-04 Wenhao Yu , Hongming Zhang , Xiaoman Pan , Kaixin Ma , Hongwei Wang , Dong Yu

Reliable question answering requires identifying not only whether an answer is correct, but also which available knowledge the prediction depends on. In realistic LLM-based QA, this knowledge may come from context, retrieval, decomposition,…

Computation and Language · Computer Science 2026-05-28 Chaodong Tong , Qi Zhang , Nannan Sun , Lei Jiang , Yanbing Liu

In recent years, large-scale language models (LLMs) have gained attention for their impressive text generation capabilities. However, these models often face the challenge of "hallucination," which undermines their reliability. In this…

Computation and Language · Computer Science 2023-10-10 Yuchen Yang , Houqiang Li , Yanfeng Wang , Yu Wang

Equipped with Chain-of-Thought (CoT), Large language models (LLMs) have shown impressive reasoning ability in various downstream tasks. Even so, suffering from hallucinations and the inability to access external knowledge, LLMs often come…

Computation and Language · Computer Science 2023-10-31 Keheng Wang , Feiyu Duan , Sirui Wang , Peiguang Li , Yunsen Xian , Chuantao Yin , Wenge Rong , Zhang Xiong

Large language models (LLMs) exhibit a wide range of promising capabilities -- from step-by-step planning to commonsense reasoning -- that may provide utility for robots, but remain prone to confidently hallucinated predictions. In this…

Large Language Models (LLMs) often generate erroneous outputs, known as hallucinations, due to their limitations in discerning questions beyond their knowledge scope. While addressing hallucination has been a focal point in research,…

Computation and Language · Computer Science 2024-08-09 Hongshen Xu , Zichen Zhu , Situo Zhang , Da Ma , Shuai Fan , Lu Chen , Kai Yu

Retrieval-augmented generation (RAG) improves large language models (LLMs) by incorporating external evidence, but it also introduces knowledge conflicts when retrieved contextual knowledge (CK) and parametric knowledge (PK) disagree or are…

Information Retrieval · Computer Science 2026-05-20 Xi Zhu , Ziqi Wang , Kai Mei , Wujiang Xu , Minghao Guo , Bangji Yang , Jiajun Fan , Dimitris N. Metaxas

Large language models (LLMs) demonstrate remarkable capabilities but face challenges from hallucinations, which typically arise from insufficient knowledge or context. While instructing LLMs to acknowledge knowledge limitations by…

Computation and Language · Computer Science 2025-08-08 Jiaqi Li , Yixuan Tang , Yi Yang

This research project addresses the errors of financial numerical reasoning Question Answering (QA) tasks due to the lack of domain knowledge in finance. Despite recent advances in Large Language Models (LLMs), financial numerical questions…

Computation and Language · Computer Science 2026-01-01 Yukun Zhang , Stefan Elbl Droguett , Samyak Jain

Large Language Models (LLMs) demonstrate human-level capabilities in dialogue, reasoning, and knowledge retention. However, even the most advanced LLMs face challenges such as hallucinations and real-time updating of their knowledge.…

Computation and Language · Computer Science 2024-09-10 Xuanwang Zhang , Yunze Song , Yidong Wang , Shuyun Tang , Xinfeng Li , Zhengran Zeng , Zhen Wu , Wei Ye , Wenyuan Xu , Yue Zhang , Xinyu Dai , Shikun Zhang , Qingsong Wen

The reliability of Large Language Models (LLMs) in high-stakes domains such as healthcare, law, and scientific discovery is often compromised by hallucinations. These failures typically stem from two sources: data-driven hallucinations and…

Machine Learning · Computer Science 2026-03-03 Xinyue Zeng , Junhong Lin , Yujun Yan , Feng Guo , Liang Shi , Jun Wu , Dawei Zhou

Large Language Models (LLMs) excel in many NLP tasks but remain prone to hallucinations, limiting trust in real-world applications. We present HalluGuard, a 4B-parameter Small Reasoning Model (SRM) for mitigating hallucinations in…

Computation and Language · Computer Science 2025-10-02 Loris Bergeron , Ioana Buhnila , Jérôme François , Radu State

Knowledge augmentation has significantly enhanced the performance of Large Language Models (LLMs) in knowledge-intensive tasks. However, existing methods typically operate on the simplistic premise that model performance equates with…

Computation and Language · Computer Science 2026-02-16 Hao Chen , Ye He , Yuchun Fan , Yukun Yan , Zhenghao Liu , Qingfu Zhu , Maosong Sun , Wanxiang Che

Large Language Model (LLM) unlearning aims to erase or suppress undesirable knowledge within the model, offering promise for controlling harmful or private information to prevent misuse. However, recent studies highlight its limited…

Computation and Language · Computer Science 2025-06-10 Xiaotian Ye , Mengqi Zhang , Shu Wu