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Yilin Geng

4 accepted papers

2026

Control Illusion: The Failure of Instruction Hierarchies in Large Language Models

AAAI 2026technical

Large language models (LLMs) are increasingly deployed with hierarchical instruction schemes, where certain instructions (e.g., system-level directives) are expected to take precedence over others (e.g., user messages). Yet, we lack a systematic understanding of how effectively these hierarchical co

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2025

Libra-Leaderboard: Towards Responsible AI through a Balanced Leaderboard of Safety and Capability

NAACL 2025system demonstrations

As large language models (LLMs) continue to evolve, leaderboards play a significant role in steering their development. Existing leaderboards often prioritize model capabilities while overlooking safety concerns, leaving a significant gap in responsible AI development. To address this gap, we introd…

2025

Loki: An Open-Source Tool for Fact Verification

COLING 2025system demonstrations

We introduce Loki, an open-source tool designed to address the growing problem of misinformation. Loki adopts a human-centered approach, striking a balance between the quality of fact-checking and the cost of human involvement. It decomposes the fact-checking task into a five-step pipeline: breaking…

2022

Inducing Generalizable and Interpretable Lexica

EMNLP 2022finding

Lexica – words and associated scores – are widely used as simple, interpretable, generalizable language features to predict sentiment, emotions, mental health, and personality. They also provide insight into the psychological features behind those moods and traits. Such lexica, historically created…