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Abstain-R1: Calibrated Abstention and Post-Refusal Clarification via Verifiable RL

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Bibliographic Details
Main Authors:	Zhai, Skylar, Liang, Jingcheng, Kang, Dongyeop
Format:	Preprint
Published:	2026
Subjects:	Computation and Language Artificial Intelligence
Online Access:	Acceder al recurso
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