Exploring unanswerability in machine reading comprehension: approaches, benchmarks, and open challenges.

Artif Intell Rev · 2026 · PMC12647343 · PMID 41312427

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a clear trendno p-value reported

Across domains, a clear trend has emerged: real-world QA systems increasingly adopt techniques to detect unanswerable queries and respond with abstention, fallback, or uncertainty disclosure.

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