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Taehyun Lee

3 accepted papers

2025

Is a Peeled Apple Still Red? Evaluating LLMs’ Ability for Conceptual Combination with Property Type

NAACL 2025long

Conceptual combination is a cognitive process that merges basic concepts, enabling the creation of complex expressions. During this process, the properties of combination (e.g., the whiteness of a peeled apple) can be inherited from basic concepts, newly emerge, or be canceled. However, previous stu…

2024

TimeChara: Evaluating Point-in-Time Character Hallucination of Role-Playing Large Language Models

ACL 2024findings

While Large Language Models (LLMs) can serve as agents to simulate human behaviors (i.e., role-playing agents), we emphasize the importance of point-in-time role-playing. This situates characters at specific moments in the narrative progression for three main reasons: (i) enhancing users’ narrative…

2024

Who Wrote this Code? Watermarking for Code Generation

ACL 2024long

Since the remarkable generation performance of large language models raised ethical and legal concerns, approaches to detect machine-generated text by embedding watermarks are being developed.However, we discover that the existing works fail to function appropriately in code generation tasks due to…