Outdated Issue Aware Decoding for Reasoning Questions on Edited Knowledge

Zengkui Sun, Yijin Liu, Jiaan Wang, Fandong Meng, Jinan Xu, Yufeng Chen, Jie Zhou·June 05, 2024

Summary

This paper addresses the issue of outdated knowledge in large language models (LLMs) when editing for reasoning tasks. The authors propose DISCO (Outdated Issue Aware Decoding), a decoding strategy that amplifies the difference between original and edited models to encourage the use of updated knowledge. Experiments on datasets like zsRE and CounterFact demonstrate that DISCO significantly outperforms prior methods by improving F1 scores and reducing outdated responses. The study compares various models and techniques, highlighting the importance of balancing factors like reliability, generality, and portability. DISCO is effective in mitigating the outdated issue without retraining and suggests potential for future work on multi-hop questions and user-friendly knowledge editing tools.

Key findings

5

Paper digest

What problem does the paper attempt to solve? Is this a new problem?

The paper aims to address the issue of outdated responses generated by edited models on reasoning questions, which is termed as the "outdated issue" . This problem arises when existing methods fail to effectively utilize edited knowledge to reason new answers, resulting in retaining outdated responses from the original models . The paper introduces a decoding strategy called outDated ISsue aware deCOding (DISCO) to mitigate this problem and enhance the performance of edited models on reasoning questions . This issue is not entirely new, as it has been identified by recent studies, highlighting the need for improved methods to overcome it .


What scientific hypothesis does this paper seek to validate?

This paper aims to validate the scientific hypothesis that by implementing a decoding strategy called outDated ISsue aware deCOding (DISCO), the performance of edited models on reasoning questions can be enhanced by capturing the difference in probability distribution between the original and edited models. By amplifying the difference of token prediction in the edited model, the outdated issue, where existing methods struggle to utilize edited knowledge to reason new answers and tend to retain outdated responses, can be alleviated . DISCO significantly impacts the probability distribution, mitigates the outdated issue, and encourages the edited model to generate correct answers for reasoning questions .


What new ideas, methods, or models does the paper propose? What are the characteristics and advantages compared to previous methods?

The paper proposes a novel decoding strategy called outDated ISsue aware deCOding (DISCO) to address the issue of edited models generating outdated responses to reasoning questions . DISCO aims to encourage edited models to utilize updated knowledge for reasoning correctly without the need for explicit model re-training . This method captures and amplifies the modification in probability distribution between the original and edited models, significantly mitigating the outdated issue and promoting the generation of new correct answers for reasoning questions . DISCO focuses on one-hop reasoning questions and aims to improve the performance of edited models in generating accurate responses .

The paper discusses various existing methods and models in the field of knowledge editing for neural networks. It mentions approaches like MemPrompt, IKE, MeLLo, KE, KN, ROME, PMET, SERAC, and T-Patcher, which involve in-context learning, adjusting knowledge-related weights, and memory-based model editing to update pretrained knowledge in LLMs . These methods aim to prompt LLMs to update their knowledge without the need for extensive re-training . However, the paper highlights that existing methods tend to struggle with reasoning questions and retaining outdated responses, leading to the proposal of DISCO as a solution .

DISCO is designed to enhance the performance of edited models by focusing on the probability distribution difference between the original and edited models . By amplifying the difference in token prediction, DISCO aims to alleviate the outdated issue and improve the model's ability to reason correctly based on the updated knowledge . Experimental results demonstrate that DISCO outperforms prior state-of-the-art methods in terms of F1 scores and reduces the ratio of outdated responses on the zsRE dataset . This indicates the effectiveness of DISCO in mitigating the outdated issue and enhancing the reasoning capabilities of edited models . The proposed method, outDated ISsue aware deCOding (DISCO), introduces several key characteristics and advantages compared to previous methods in the field of knowledge editing for neural networks .

  1. Efficiency: DISCO demonstrates superior efficiency in knowledge editing by minimizing the time required for conducting edits without compromising model performance. Experimental results show that DISCO can quickly edit knowledge, outperforming other methods in terms of time efficiency while yielding remarkable performance .

  2. Model Scaling: When applied to larger models like LlaMa-2-13b, DISCO and IKE exhibit improved performance in Portability compared to LlaMa-2-7b, with significant F1 score improvements. DISCO performs better in various properties on LlaMa-2-7b, indicating its capability to enhance edited models on reasoning problems with edited knowledge .

  3. Probability Distribution Amplification: DISCO focuses on capturing and amplifying the modification in probability distribution between the original and edited models. By enhancing the difference in token prediction, DISCO effectively mitigates the outdated issue and encourages edited models to generate correct answers for reasoning questions .

  4. Time-Friendly Editing: DISCO stands out as an optimal time-friendly knowledge editing method, offering remarkable performance while minimizing the time required for edits. It outperforms other methods in terms of efficiency, making it a practical and effective approach for knowledge editing in neural networks .

  5. Performance Improvement: Experimental results indicate that DISCO significantly mitigates the outdated issue, reduces the ratio of outdated responses, and enhances the performance of edited models on reasoning questions. It outperforms prior state-of-the-art methods in terms of F1 scores, demonstrating its effectiveness in promoting accurate reasoning based on updated knowledge .

In summary, DISCO's efficiency, model scaling capabilities, focus on probability distribution amplification, time-friendly editing approach, and performance enhancement make it a promising and effective method for addressing the outdated issue in edited models and improving reasoning capabilities based on updated knowledge .


Do any related researches exist? Who are the noteworthy researchers on this topic in this field?What is the key to the solution mentioned in the paper?

Several related research papers and researchers are mentioned in the context regarding the issue of outdated knowledge in language models and the proposed solution of Outdated Issue Aware Decoding (DISCO).

Noteworthy researchers in this field include Aman Madaan, Niket Tandon, Peter Clark, Yiming Yang, Vittorio Mazzia, Alessandro Pedrani, Andrea Caciolai, Kay Rottmann, Davide Bernardi, Kevin Meng, David Bau, Alex Andonian, Yonatan Belinkov, Eric Mitchell, Charles Lin, Antoine Bosselut, Chelsea Finn, Christopher D Manning, German I Parisi, Ronald Kemker, Jose L Part, Christopher Kanan, Stefan Wermter, Pranav Rajpurkar, Jian Zhang, Konstantin Lopyrev, Percy Liang, Vinay Venkatesh Ramasesh, Aitor Lewkowycz, Ethan Dyer, Yung-Sung Chuang, Yujia Xie, Hongyin Luo, Yoon Kim, James Glass, Pengcheng He, Damai Dai, Li Dong, Yaru Hao, Zhifang Sui, Baobao Chang, Furu Wei, Nicola De Cao, Wilker Aziz, Ivan Titov, Bhuwan Dhingra, Jeremy R Cole, Julian Martin Eisenschlos, Daniel Gillick, Jacob Eisenstein, William W Cohen, Yanai Elazar, Nora Kassner, Shauli Ravfogel, Abhilasha Ravichander, Eduard Hovy, Hinrich Schütze, Yoav Goldberg, Zeyu Huang, Yikang Shen, Xiaofeng Zhang, Jie Zhou, Wenge Rong, Zhang Xiong, Omer Levy, Minjoon Seo, Eunsol Choi, Luke Zettlemoyer, Xiang Lisa Li, Ari Holtzman, Daniel Fried, Percy Liang, Jason Eisner, Tatsunori Hashimoto, Mike Lewis, Xiaopeng Li, Shasha Li, Shezheng Song, Jing Yang, Jun Ma, Jie Yu, Jun-Yu Ma, Jia-Chen Gu, Zhen-Hua Ling, Quan Liu, and Cong Liu .

The key to the solution mentioned in the paper is the Outdated Issue Aware Decoding (DISCO) strategy. DISCO aims to enhance the performance of edited models on reasoning questions by capturing the difference in probability distribution between the original and edited models. It amplifies the difference of token prediction in the edited model to alleviate the outdated issue, thus improving the model's performance with respect to the edited knowledge. By amplifying the impact of edited knowledge on the probability distribution, DISCO encourages the edited model to generate correct answers for reasoning questions .


How were the experiments in the paper designed?

The experiments in the paper were designed to evaluate the performance of edited models on reasoning questions based on knowledge editing. The experiments mainly focused on two datasets: zsRE and CounterFact. The zsRE dataset was extended and adopted for knowledge editing, specifically on one-hop reasoning questions. Additionally, the CounterFact dataset, which consists of counterfactual edits, was used to evaluate the models' performance . The experiments involved using different backbones such as GPT-J-6b, LlaMa-2-7b, and LlaMa-2-13b, along with four baseline methods: directly fine-tuning language models, ROME, MEMIT, and IKE . The experiments aimed to assess the impact of hyperparameters, such as α in DISCO, on the model's performance on the zsRE dataset . The paper also discussed the efficiency of knowledge editing methods in terms of time required for edits and model scaling, particularly comparing the performance of DISCO with other methods .


What is the dataset used for quantitative evaluation? Is the code open source?

The dataset used for quantitative evaluation in the study is the zsRE dataset . The code for the methods and experiments conducted in the research is not explicitly mentioned to be open source in the provided context. If you are interested in accessing the code, it would be advisable to refer directly to the authors of the study for more information on the availability of the code .


Do the experiments and results in the paper provide good support for the scientific hypotheses that need to be verified? Please analyze.

The experiments and results presented in the paper provide strong support for the scientific hypotheses that need to be verified. The paper introduces a decoding strategy called outDated ISsue aware deCOding (DISCO) to address the issue of outdated responses generated by edited models when reasoning with new knowledge . The experiments conducted on the zsRE and CounterFact datasets demonstrate the effectiveness of DISCO in enhancing the performance of edited models on reasoning questions . Specifically, DISCO significantly reduces the ratio of outdated responses and improves the model's ability to reason correctly with the edited knowledge .

The experimental setup includes the evaluation of DISCO on different datasets such as zsRE and CounterFact, which are widely used for knowledge editing and reasoning tasks . The results show that DISCO outperforms the state-of-the-art method by a substantial margin in terms of F1 scores and reduces the ratio of outdated issues, indicating its effectiveness in improving model performance . Additionally, the paper compares DISCO with other baseline methods like ROME and MEMIT, showcasing the superiority of DISCO in addressing the outdated issue in reasoning questions .

Furthermore, the analysis of the probability distribution between the original and edited models, as well as the impact of the edited knowledge on the model's output, provides valuable insights into the effectiveness of DISCO in mitigating the outdated issue . By amplifying the difference in probability distribution and enhancing token predictions, DISCO helps the edited models reason more accurately with the new knowledge, leading to a significant reduction in outdated responses .

In conclusion, the experiments and results presented in the paper offer strong empirical evidence to support the scientific hypotheses underlying the development and effectiveness of the outDated ISsue aware deCOding (DISCO) decoding strategy. The findings demonstrate that DISCO is a promising approach to improve the performance of edited models on reasoning questions by reducing outdated responses and enhancing the utilization of edited knowledge for accurate reasoning .


What are the contributions of this paper?

The contributions of the paper "Outdated Issue Aware Decoding for Reasoning Questions on Edited Knowledge" include:

  • Proposing a decoding strategy called outDated ISsue aware deCOding (DISCO) to enhance the performance of edited models on reasoning questions by capturing the difference in probability distribution between original and edited models .
  • Introducing a method to amplify the difference of token prediction in the edited model to alleviate the outdated issue, leading to improved model performance in reasoning tasks .
  • Demonstrating that applying DISCO can enhance edited models to reason better, outperforming the prior state-of-the-art method by 12.99 F1 scores and reducing the ratio of the outdated issue to 5.78% on the zsRE dataset .
  • Addressing the challenge of outdated responses generated by original models utilizing original knowledge, which can hinder correct answers to reasoning questions, and proposing DISCO as a solution to alleviate this issue and encourage correct answer generation .

What work can be continued in depth?

Further research in this area can delve deeper into the impact of knowledge editing on reasoning questions and explore methods to enhance the performance of edited models. Specifically, future work could focus on improving the Portability aspect of knowledge editing, which requires edited models to truly learn and reason based on the edited knowledge provided . Additionally, investigating the effectiveness of different techniques such as in-context learning or adjusting knowledge-related weights in original LLMs could be valuable for addressing the outdated issue in reasoning questions .

Tables

4

Introduction
Background
Evolution of large language models and their reasoning capabilities
Importance of up-to-date knowledge in LLMs for reasoning tasks
Objective
To propose a decoding strategy, DISCO, for addressing outdated knowledge
Improve reasoning task performance and reduce outdated responses
Method
Data Collection
Selection of datasets: zsRE, CounterFact for evaluation
Dataset characteristics: reasoning tasks, relevance to outdated knowledge issue
Data Preprocessing
Preparing input and output data for model training
Identifying outdated and up-to-date knowledge instances
DISCO: Outdated Issue Aware Decoding
Algorithm Description
Amplify difference between original and edited models
Encourage updated knowledge usage during decoding
Performance Metrics
F1 scores for evaluating outdated response reduction
Comparison with prior methods
Experiments and Results
Model comparison: LLMs with and without DISCO
Effectiveness of DISCO on reasoning tasks
Trade-offs between reliability, generality, and portability
Evaluation
Improved F1 scores on zsRE and CounterFact datasets
Real-world implications and benefits of DISCO
Future Directions
Multi-hop Questions
Potential for enhancing DISCO for complex reasoning tasks
User-friendly Knowledge Editing Tools
Suggestions for future research on accessible knowledge editing for LLMs
Conclusion
Summary of DISCO's impact on mitigating outdated knowledge in LLMs
Significance for the advancement of reasoning tasks in NLP
Basic info
papers
computation and language
artificial intelligence
Advanced features
Insights
How does DISCO perform compared to prior methods in the experiments with datasets like zsRE and CounterFact?
What is the proposed solution to address outdated knowledge in LLMs by the authors?
What does the paper focus on in terms of large language models?
What are the key factors the study emphasizes when evaluating different models and techniques for editing LLMs?

Outdated Issue Aware Decoding for Reasoning Questions on Edited Knowledge

Zengkui Sun, Yijin Liu, Jiaan Wang, Fandong Meng, Jinan Xu, Yufeng Chen, Jie Zhou·June 05, 2024

Summary

This paper addresses the issue of outdated knowledge in large language models (LLMs) when editing for reasoning tasks. The authors propose DISCO (Outdated Issue Aware Decoding), a decoding strategy that amplifies the difference between original and edited models to encourage the use of updated knowledge. Experiments on datasets like zsRE and CounterFact demonstrate that DISCO significantly outperforms prior methods by improving F1 scores and reducing outdated responses. The study compares various models and techniques, highlighting the importance of balancing factors like reliability, generality, and portability. DISCO is effective in mitigating the outdated issue without retraining and suggests potential for future work on multi-hop questions and user-friendly knowledge editing tools.
Mind map
Comparison with prior methods
F1 scores for evaluating outdated response reduction
Encourage updated knowledge usage during decoding
Amplify difference between original and edited models
Suggestions for future research on accessible knowledge editing for LLMs
Potential for enhancing DISCO for complex reasoning tasks
Trade-offs between reliability, generality, and portability
Effectiveness of DISCO on reasoning tasks
Model comparison: LLMs with and without DISCO
Performance Metrics
Algorithm Description
Identifying outdated and up-to-date knowledge instances
Preparing input and output data for model training
Dataset characteristics: reasoning tasks, relevance to outdated knowledge issue
Selection of datasets: zsRE, CounterFact for evaluation
Improve reasoning task performance and reduce outdated responses
To propose a decoding strategy, DISCO, for addressing outdated knowledge
Importance of up-to-date knowledge in LLMs for reasoning tasks
Evolution of large language models and their reasoning capabilities
Significance for the advancement of reasoning tasks in NLP
Summary of DISCO's impact on mitigating outdated knowledge in LLMs
User-friendly Knowledge Editing Tools
Multi-hop Questions
Real-world implications and benefits of DISCO
Improved F1 scores on zsRE and CounterFact datasets
Experiments and Results
DISCO: Outdated Issue Aware Decoding
Data Preprocessing
Data Collection
Objective
Background
Conclusion
Future Directions
Evaluation
Method
Introduction
Outline
Introduction
Background
Evolution of large language models and their reasoning capabilities
Importance of up-to-date knowledge in LLMs for reasoning tasks
Objective
To propose a decoding strategy, DISCO, for addressing outdated knowledge
Improve reasoning task performance and reduce outdated responses
Method
Data Collection
Selection of datasets: zsRE, CounterFact for evaluation
Dataset characteristics: reasoning tasks, relevance to outdated knowledge issue
Data Preprocessing
Preparing input and output data for model training
Identifying outdated and up-to-date knowledge instances
DISCO: Outdated Issue Aware Decoding
Algorithm Description
Amplify difference between original and edited models
Encourage updated knowledge usage during decoding
Performance Metrics
F1 scores for evaluating outdated response reduction
Comparison with prior methods
Experiments and Results
Model comparison: LLMs with and without DISCO
Effectiveness of DISCO on reasoning tasks
Trade-offs between reliability, generality, and portability
Evaluation
Improved F1 scores on zsRE and CounterFact datasets
Real-world implications and benefits of DISCO
Future Directions
Multi-hop Questions
Potential for enhancing DISCO for complex reasoning tasks
User-friendly Knowledge Editing Tools
Suggestions for future research on accessible knowledge editing for LLMs
Conclusion
Summary of DISCO's impact on mitigating outdated knowledge in LLMs
Significance for the advancement of reasoning tasks in NLP
Key findings
5

Paper digest

What problem does the paper attempt to solve? Is this a new problem?

The paper aims to address the issue of outdated responses generated by edited models on reasoning questions, which is termed as the "outdated issue" . This problem arises when existing methods fail to effectively utilize edited knowledge to reason new answers, resulting in retaining outdated responses from the original models . The paper introduces a decoding strategy called outDated ISsue aware deCOding (DISCO) to mitigate this problem and enhance the performance of edited models on reasoning questions . This issue is not entirely new, as it has been identified by recent studies, highlighting the need for improved methods to overcome it .


What scientific hypothesis does this paper seek to validate?

This paper aims to validate the scientific hypothesis that by implementing a decoding strategy called outDated ISsue aware deCOding (DISCO), the performance of edited models on reasoning questions can be enhanced by capturing the difference in probability distribution between the original and edited models. By amplifying the difference of token prediction in the edited model, the outdated issue, where existing methods struggle to utilize edited knowledge to reason new answers and tend to retain outdated responses, can be alleviated . DISCO significantly impacts the probability distribution, mitigates the outdated issue, and encourages the edited model to generate correct answers for reasoning questions .


What new ideas, methods, or models does the paper propose? What are the characteristics and advantages compared to previous methods?

The paper proposes a novel decoding strategy called outDated ISsue aware deCOding (DISCO) to address the issue of edited models generating outdated responses to reasoning questions . DISCO aims to encourage edited models to utilize updated knowledge for reasoning correctly without the need for explicit model re-training . This method captures and amplifies the modification in probability distribution between the original and edited models, significantly mitigating the outdated issue and promoting the generation of new correct answers for reasoning questions . DISCO focuses on one-hop reasoning questions and aims to improve the performance of edited models in generating accurate responses .

The paper discusses various existing methods and models in the field of knowledge editing for neural networks. It mentions approaches like MemPrompt, IKE, MeLLo, KE, KN, ROME, PMET, SERAC, and T-Patcher, which involve in-context learning, adjusting knowledge-related weights, and memory-based model editing to update pretrained knowledge in LLMs . These methods aim to prompt LLMs to update their knowledge without the need for extensive re-training . However, the paper highlights that existing methods tend to struggle with reasoning questions and retaining outdated responses, leading to the proposal of DISCO as a solution .

DISCO is designed to enhance the performance of edited models by focusing on the probability distribution difference between the original and edited models . By amplifying the difference in token prediction, DISCO aims to alleviate the outdated issue and improve the model's ability to reason correctly based on the updated knowledge . Experimental results demonstrate that DISCO outperforms prior state-of-the-art methods in terms of F1 scores and reduces the ratio of outdated responses on the zsRE dataset . This indicates the effectiveness of DISCO in mitigating the outdated issue and enhancing the reasoning capabilities of edited models . The proposed method, outDated ISsue aware deCOding (DISCO), introduces several key characteristics and advantages compared to previous methods in the field of knowledge editing for neural networks .

  1. Efficiency: DISCO demonstrates superior efficiency in knowledge editing by minimizing the time required for conducting edits without compromising model performance. Experimental results show that DISCO can quickly edit knowledge, outperforming other methods in terms of time efficiency while yielding remarkable performance .

  2. Model Scaling: When applied to larger models like LlaMa-2-13b, DISCO and IKE exhibit improved performance in Portability compared to LlaMa-2-7b, with significant F1 score improvements. DISCO performs better in various properties on LlaMa-2-7b, indicating its capability to enhance edited models on reasoning problems with edited knowledge .

  3. Probability Distribution Amplification: DISCO focuses on capturing and amplifying the modification in probability distribution between the original and edited models. By enhancing the difference in token prediction, DISCO effectively mitigates the outdated issue and encourages edited models to generate correct answers for reasoning questions .

  4. Time-Friendly Editing: DISCO stands out as an optimal time-friendly knowledge editing method, offering remarkable performance while minimizing the time required for edits. It outperforms other methods in terms of efficiency, making it a practical and effective approach for knowledge editing in neural networks .

  5. Performance Improvement: Experimental results indicate that DISCO significantly mitigates the outdated issue, reduces the ratio of outdated responses, and enhances the performance of edited models on reasoning questions. It outperforms prior state-of-the-art methods in terms of F1 scores, demonstrating its effectiveness in promoting accurate reasoning based on updated knowledge .

In summary, DISCO's efficiency, model scaling capabilities, focus on probability distribution amplification, time-friendly editing approach, and performance enhancement make it a promising and effective method for addressing the outdated issue in edited models and improving reasoning capabilities based on updated knowledge .


Do any related researches exist? Who are the noteworthy researchers on this topic in this field?What is the key to the solution mentioned in the paper?

Several related research papers and researchers are mentioned in the context regarding the issue of outdated knowledge in language models and the proposed solution of Outdated Issue Aware Decoding (DISCO).

Noteworthy researchers in this field include Aman Madaan, Niket Tandon, Peter Clark, Yiming Yang, Vittorio Mazzia, Alessandro Pedrani, Andrea Caciolai, Kay Rottmann, Davide Bernardi, Kevin Meng, David Bau, Alex Andonian, Yonatan Belinkov, Eric Mitchell, Charles Lin, Antoine Bosselut, Chelsea Finn, Christopher D Manning, German I Parisi, Ronald Kemker, Jose L Part, Christopher Kanan, Stefan Wermter, Pranav Rajpurkar, Jian Zhang, Konstantin Lopyrev, Percy Liang, Vinay Venkatesh Ramasesh, Aitor Lewkowycz, Ethan Dyer, Yung-Sung Chuang, Yujia Xie, Hongyin Luo, Yoon Kim, James Glass, Pengcheng He, Damai Dai, Li Dong, Yaru Hao, Zhifang Sui, Baobao Chang, Furu Wei, Nicola De Cao, Wilker Aziz, Ivan Titov, Bhuwan Dhingra, Jeremy R Cole, Julian Martin Eisenschlos, Daniel Gillick, Jacob Eisenstein, William W Cohen, Yanai Elazar, Nora Kassner, Shauli Ravfogel, Abhilasha Ravichander, Eduard Hovy, Hinrich Schütze, Yoav Goldberg, Zeyu Huang, Yikang Shen, Xiaofeng Zhang, Jie Zhou, Wenge Rong, Zhang Xiong, Omer Levy, Minjoon Seo, Eunsol Choi, Luke Zettlemoyer, Xiang Lisa Li, Ari Holtzman, Daniel Fried, Percy Liang, Jason Eisner, Tatsunori Hashimoto, Mike Lewis, Xiaopeng Li, Shasha Li, Shezheng Song, Jing Yang, Jun Ma, Jie Yu, Jun-Yu Ma, Jia-Chen Gu, Zhen-Hua Ling, Quan Liu, and Cong Liu .

The key to the solution mentioned in the paper is the Outdated Issue Aware Decoding (DISCO) strategy. DISCO aims to enhance the performance of edited models on reasoning questions by capturing the difference in probability distribution between the original and edited models. It amplifies the difference of token prediction in the edited model to alleviate the outdated issue, thus improving the model's performance with respect to the edited knowledge. By amplifying the impact of edited knowledge on the probability distribution, DISCO encourages the edited model to generate correct answers for reasoning questions .


How were the experiments in the paper designed?

The experiments in the paper were designed to evaluate the performance of edited models on reasoning questions based on knowledge editing. The experiments mainly focused on two datasets: zsRE and CounterFact. The zsRE dataset was extended and adopted for knowledge editing, specifically on one-hop reasoning questions. Additionally, the CounterFact dataset, which consists of counterfactual edits, was used to evaluate the models' performance . The experiments involved using different backbones such as GPT-J-6b, LlaMa-2-7b, and LlaMa-2-13b, along with four baseline methods: directly fine-tuning language models, ROME, MEMIT, and IKE . The experiments aimed to assess the impact of hyperparameters, such as α in DISCO, on the model's performance on the zsRE dataset . The paper also discussed the efficiency of knowledge editing methods in terms of time required for edits and model scaling, particularly comparing the performance of DISCO with other methods .


What is the dataset used for quantitative evaluation? Is the code open source?

The dataset used for quantitative evaluation in the study is the zsRE dataset . The code for the methods and experiments conducted in the research is not explicitly mentioned to be open source in the provided context. If you are interested in accessing the code, it would be advisable to refer directly to the authors of the study for more information on the availability of the code .


Do the experiments and results in the paper provide good support for the scientific hypotheses that need to be verified? Please analyze.

The experiments and results presented in the paper provide strong support for the scientific hypotheses that need to be verified. The paper introduces a decoding strategy called outDated ISsue aware deCOding (DISCO) to address the issue of outdated responses generated by edited models when reasoning with new knowledge . The experiments conducted on the zsRE and CounterFact datasets demonstrate the effectiveness of DISCO in enhancing the performance of edited models on reasoning questions . Specifically, DISCO significantly reduces the ratio of outdated responses and improves the model's ability to reason correctly with the edited knowledge .

The experimental setup includes the evaluation of DISCO on different datasets such as zsRE and CounterFact, which are widely used for knowledge editing and reasoning tasks . The results show that DISCO outperforms the state-of-the-art method by a substantial margin in terms of F1 scores and reduces the ratio of outdated issues, indicating its effectiveness in improving model performance . Additionally, the paper compares DISCO with other baseline methods like ROME and MEMIT, showcasing the superiority of DISCO in addressing the outdated issue in reasoning questions .

Furthermore, the analysis of the probability distribution between the original and edited models, as well as the impact of the edited knowledge on the model's output, provides valuable insights into the effectiveness of DISCO in mitigating the outdated issue . By amplifying the difference in probability distribution and enhancing token predictions, DISCO helps the edited models reason more accurately with the new knowledge, leading to a significant reduction in outdated responses .

In conclusion, the experiments and results presented in the paper offer strong empirical evidence to support the scientific hypotheses underlying the development and effectiveness of the outDated ISsue aware deCOding (DISCO) decoding strategy. The findings demonstrate that DISCO is a promising approach to improve the performance of edited models on reasoning questions by reducing outdated responses and enhancing the utilization of edited knowledge for accurate reasoning .


What are the contributions of this paper?

The contributions of the paper "Outdated Issue Aware Decoding for Reasoning Questions on Edited Knowledge" include:

  • Proposing a decoding strategy called outDated ISsue aware deCOding (DISCO) to enhance the performance of edited models on reasoning questions by capturing the difference in probability distribution between original and edited models .
  • Introducing a method to amplify the difference of token prediction in the edited model to alleviate the outdated issue, leading to improved model performance in reasoning tasks .
  • Demonstrating that applying DISCO can enhance edited models to reason better, outperforming the prior state-of-the-art method by 12.99 F1 scores and reducing the ratio of the outdated issue to 5.78% on the zsRE dataset .
  • Addressing the challenge of outdated responses generated by original models utilizing original knowledge, which can hinder correct answers to reasoning questions, and proposing DISCO as a solution to alleviate this issue and encourage correct answer generation .

What work can be continued in depth?

Further research in this area can delve deeper into the impact of knowledge editing on reasoning questions and explore methods to enhance the performance of edited models. Specifically, future work could focus on improving the Portability aspect of knowledge editing, which requires edited models to truly learn and reason based on the edited knowledge provided . Additionally, investigating the effectiveness of different techniques such as in-context learning or adjusting knowledge-related weights in original LLMs could be valuable for addressing the outdated issue in reasoning questions .

Tables
4
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