Squad 2 0 Compatible Unanswerable Question Detection

via “adversarial unanswerable question generation and validation”

150K reading comprehension questions including unanswerable ones.

Unique: Pioneered adversarial unanswerable questions in QA benchmarks by having crowdworkers explicitly write questions that CANNOT be answered from a passage. This is fundamentally different from randomly sampling unanswerable questions; adversarial construction ensures questions are plausible but genuinely unanswerable.

vs others: More challenging than datasets with random negative examples (e.g., MS MARCO) because adversarial questions require models to understand semantic relevance, not just keyword matching, to distinguish answerable from unanswerable.

via “squad 2.0 unanswerable question detection”

question-answering model by undefined. 2,87,434 downloads.

Unique: Trained on SQuAD 2.0's adversarial unanswerable questions, learning to distinguish answerable from unanswerable via the same span prediction mechanism rather than a separate binary classifier. This is more parameter-efficient but less explicit than dedicated answerability heads.

vs others: More robust to unanswerable questions than SQuAD 1.1-only models because it was explicitly trained on adversarial non-answers, reducing hallucination on out-of-scope queries.

via “squad v2 benchmark-aligned evaluation with unanswerable question handling”

question-answering model by undefined. 6,23,377 downloads.

Unique: Explicitly trained on SQuAD v2's unanswerable questions subset, learning to recognize when no valid answer exists rather than always extracting a span — unlike SQuAD v1-only models that lack this capability and will hallucinate answers for out-of-scope questions

vs others: More reliable than v1-trained models in production because it can admit when it doesn't know, reducing false positive answers and improving user trust in systems that route unanswerable questions to humans

via “adversarial no-answer detection via binary classification head”

question-answering model by undefined. 8,99,590 downloads.

Unique: Explicitly trained on SQuAD 2.0's adversarial no-answer examples (human-written questions that appear answerable but have no correct answer in the passage), giving it a specialized capability to reject unanswerable questions rather than extracting incorrect spans. This is a distinct training objective from standard SQuAD 1.1 models.

vs others: More robust to adversarial no-answer cases than BERT-base QA models trained only on SQuAD 1.1, but requires careful threshold tuning and may not generalize to no-answer patterns outside SQuAD 2.0's distribution.

via “squad v2 benchmark-aligned answer span prediction”

question-answering model by undefined. 1,93,069 downloads.

Unique: Trained on SQuAD v2's 50k unanswerable questions (vs. SQuAD v1 which had only answerable questions), exposing the model to negative examples where the answer is not in the passage, improving robustness to out-of-distribution queries

vs others: Achieves ~88-90 F1 on SQuAD v2 dev set (competitive with BERT-large baseline); better calibrated confidence scores than SQuAD v1-only models due to unanswerable question exposure

via “unanswerable question detection”

question-answering model by undefined. 1,45,572 downloads.

Unique: Explicitly trained on SQuAD 2.0's adversarial unanswerable questions (33% of dataset), learning to recognize when context genuinely lacks information rather than defaulting to low-confidence extractions like SQuAD 1.1-only models

vs others: More reliable than post-hoc confidence filtering because the model learned unanswerable patterns during training, rather than relying on threshold heuristics applied to models trained only on answerable questions

via “squad 2.0-compatible unanswerable question detection”

question-answering model by undefined. 1,90,899 downloads.

Unique: Trained on SQuAD 2.0's adversarial unanswerable questions (33% of dataset), learning to predict null spans rather than forcing answers from irrelevant text; uses disentangled attention to better distinguish between answerable and unanswerable contexts

vs others: Achieves 88%+ F1 on SQuAD 2.0 unanswerable detection vs 75-80% for models fine-tuned only on SQuAD 1.1, reducing false-positive answer hallucinations in production systems

via “squad-v2-optimized span boundary detection”

question-answering model by undefined. 3,19,759 downloads.

Unique: Explicitly trained on SQuAD v2's 30% unanswerable questions with negative sampling, enabling the model to learn when to output null predictions rather than forcing spurious span selections — a critical capability absent in v1-only models

vs others: More robust than SQuAD v1-trained models on real-world QA because it has learned to recognize and correctly handle unanswerable questions, reducing false-positive answer predictions in production systems

via “adversarial unanswerable question detection”

question-answering model by undefined. 1,24,380 downloads.

Unique: SQuAD v2 training includes 30% adversarial unanswerable examples written by humans to trick extractive models, enabling robust null prediction vs SQuAD v1 models that assume all questions are answerable

vs others: Provides built-in unanswerable detection without separate classifier, reducing latency vs ensemble approaches; more robust than simple confidence thresholding due to adversarial training

via “unanswerable question detection with confidence scoring”

question-answering model by undefined. 32,657 downloads.

Unique: SQuAD v2 training includes adversarially-written unanswerable questions (plausible but incorrect passages) rather than random negatives, forcing the model to learn semantic mismatch detection. MobileBERT preserves this capability through its [CLS] token 'no answer' head, enabling robust abstention without post-hoc filtering.

vs others: More reliable unanswerable detection than SQuAD v1-only models due to adversarial training data; comparable to full BERT-base but with 5.5x faster inference, making it practical for real-time filtering in retrieval pipelines.

via “unanswerable question detection via confidence thresholding”

question-answering model by undefined. 49,594 downloads.

Unique: Trained on SQuAD v2's explicit unanswerable examples (33% of dataset), enabling the model to learn patterns of when passages lack relevant information, rather than relying on post-hoc confidence thresholding alone — this is baked into the model's learned representations

vs others: More reliable than generic confidence thresholding on SQuAD v2 benchmarks because the model explicitly learned unanswerable patterns; more interpretable than learned rejection classifiers because decisions map directly to span prediction confidence

via “squad 2.0-calibrated confidence scoring for unanswerable detection”

question-answering model by undefined. 66,453 downloads.

Unique: Trained on SQuAD 2.0's explicit unanswerable question set, enabling the model to learn when NOT to extract an answer rather than defaulting to the highest-scoring span — a critical distinction from SQuAD 1.1-only models that always force an extraction

vs others: More reliable at rejecting unanswerable questions than SQuAD 1.1-trained models, reducing false-positive answer extractions in production systems by ~15-20% on adversarial test sets