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Samuel Bell

Researcher, Facebook

1 paper at NeurIPS 2025

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Poster Session 5

1 paper
Friday, December 5, 2025 · 11:00 AM → 2:00 PM
Exhibit Hall C,D,E
AbstentionBench: Reasoning LLMs Fail on Unanswerable Questions
#1402 · Polina Kirichenko, Mark Ibrahim, Kamalika Chaudhuri, Samuel Bell

Our new benchmark AbstentionBench reveals reasoning models struggle to determine when not to answer.