Direct Evaluation of Chain-of-Thought in Multi-hop Reasoning with
  Knowledge Graphs
Minh-Vuong Nguyen Linhao Luo Fatemeh Shiri Dinh Phung Yuan-Fang Li Thuy-Trang Vu Gholamreza Haffari
Large language models (LLMs) demonstrate strong reasoning abilities when
prompted to generate chain-of-thought (CoT) explanations alongside answers.
However, previous research on evaluating LLMs has solely focused on answer
accuracy, neglecting the correctness of the generated CoT. In this paper, we
delve deeper into the CoT reasoning capabilities of LLMs in multi-hop question
answering by utilizing knowledge graphs (KGs). We propose a novel
discriminative and generative CoT evaluation paradigm to assess LLMs' knowledge
of reasoning and the accuracy of the generated CoT. Through experiments
conducted on 5 different families of LLMs across 2 multi-hop question-answering
datasets, we find that LLMs possess sufficient knowledge to perform reasoning.
However, there exists a significant disparity between answer accuracy and
faithfulness of the CoT reasoning generated by LLMs, indicating that they often
arrive at correct answers through incorrect reasoning.