arxiv
PublishedApril 17, 2026 at 4:00 AM
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Knowing When Not to Answer: Evaluating Abstention in Multimodal Reasoning Systems
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arXiv:2604.14799v1 Announce Type: new Abstract: Effective abstention (EA), recognizing evidence insufficiency and refraining from answering, is critical for reliable multimodal systems. Yet existing evaluation paradigms for vision-language models (VLMs) and multi-agent systems (MAS) assume answerabi
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