Datasets:

lrsbrgrn
/

HalluGuard-Preferences-76k

The dataset uses a "Size-Based Heuristic" to create pairs. Every example contains a Prompt (the task), a Chosen response (the good behavior), and a Rejected response (the bad behavior).

1. The David vs. Goliath Setup

Chosen Response: Generated by (Qwen/Qwen3-235B-A22B). These responses represent high-quality reasoning and correct labels.
Rejected Response: Generated by (Qwen/Qwen3-0.6B). These responses represent weaker reasoning, lack of evidence, or incorrect labels.

2. Multi-Stage Filtering

To ensure the Chosen response is actually superior, we applied:

Label Verification: We discarded the pair if the Qwen3-235B-A22B's classification didn't match the original ground-truth label.
Consensus Filtering: Two independent "Judge" models (openai/gpt-oss-120b and DeepSeek-V3.1) reviewed the pairs. Only pairs where both judges preferred the Qwen3-235B-A22B's answer were kept.

📦 Dataset Structure

Field	Content
Prompt	Instructions + Document + Claim
Chosen	`<think>Detailed reasoning</think>` + `<answer><classification>Label</classification><justification>Evidence</justification></answer>`
Rejected	`<think>Flawed/Short reasoning</think>` + `<answer><classification>Label</classification><justification>Evidence</justification></answer>`

⚠️ Limitations

Synthetic data: may not capture all real-world hallucination patterns
English-only
Document-grounded: labels reflect support relative to the document, not real-world truth
Potential biases inherited from web data (i.e., FineWeb) and style rewriting

⚖️ Ethical Considerations

Models trained on this dataset should be used as decision-support systems, not fully autonomous systems. Errors may include:

false positives (flagging correct claims)
false negatives (missing hallucinations) Human oversight is recommended, especially in sensitive domains.

📚 Citation

@article{bergeron2025halluguard,
  title={HalluGuard: Evidence-Grounded Small Reasoning Models to Mitigate Hallucinations in Retrieval-Augmented Generation},
  author={Bergeron, Loris and Buhnila, Ioana and François, Jérôme and State, Radu},
  journal={arXiv preprint arXiv:2510.00880},
  year={2025}
}

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HalluGuard

Collection

3 items • Updated 11 days ago

Paper for lrsbrgrn/HalluGuard-Preferences-76k

HalluGuard: Evidence-Grounded Small Reasoning Models to Mitigate Hallucinations in Retrieval-Augmented Generation

Paper • 2510.00880 • Published Oct 1, 2025 • 1

id stringlengths 36 36	prompt listlengths 1 1	chosen listlengths 1 1	rejected listlengths 1 1
ce648e8a-c2ac-4d9a-ab35-8c1973d011bc	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. The claim is: \"Karlee Albertson is 15 years old.\"\n\nLet's look at the document for information about Karlee Albertson's age.\n\nIn the document, we find:\n\"This letter is to formally recognize the remarkable efforts of Karl...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this. The user wants me to determine if the claim \"Karlee Albertson is 15 years old\" is grounded, hallucinated intrinsic, or hallucinated extrinsic based on the provided document.\n\nFirst, I'll look through the document. The document starts w...
d47da786-9847-4537-ada5-be5b778a92eb	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as GROUNDED, HALLUCINATED_INTRINSIC, or HALLUCINATED_EXTRINSIC based ONLY on the document.\n\nFirst, let's read the document:\n\n\"The article argues that the U.S. Congress faces a critical decision o...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine if the claim is grounded, hallucinated intrinsic, or hallucinated extrinsic based on the document.\n\nFirst, I'll read through the document carefully. The main point...
22ee9b86-67ee-47c2-80cf-a762bb212f6f	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as one of:\n GROUNDED: if the claim is fully supported by the document.\n HALLUCINATED_INTRINSIC: if the claim contradicts the document or its clear implications.\n HALLUCINATED_EXTRINSIC: if the c...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine if the claim is GROUNDED, HALLUCINATED_INTRINSIC, or HALLUCINATED_EXTRINSIC based only on the document.\n\nFirst, I'll read through the document to find relevant inf...
7332a62a-74ab-4081-b8db-e34ec32e97fe	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as one of:\n - GROUNDED: fully supported by the document.\n - HALLUCINATED_INTRINSIC: contradicts the document or what it clearly implies.\n - HALLUCINATED_EXTRINSIC: includes information not state...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user wants me to determine if the claim is grounded, hallucinated intrinsic, or hallucinated extrinsic based on the provided document. The claim is: \"Jermaine Ward, who in 2011 admitted to lying to police to avoid arrest for d...
db932617-a34a-4049-8d4d-16d01857410d	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as:\n- GROUNDED: if the document fully supports the claim.\n- HALLUCINATED_INTRINSIC: if the claim contradicts the document or what it clearly implies.\n- HALLUCINATED_EXTRINSIC: if the claim includes...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine if the claim is grounded, hallucinated intrinsic, or hallucinated extrinsic based only on the document. \n\nFirst, I'll read through the document to find any relevan...
6961e16f-8269-403b-8c4d-b90fcef6f3bf	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. The claim is: \"Their first step was to extract the standing water to prevent further damage.\"\n\nWe must classify the claim as one of:\n- GROUNDED: if the document fully supports the claim.\n- HALLUCINATED_INTRINSIC: if the c...	[ { "role": "assistant", "content": "<think>\nOkay, let's see. The user wants to know if the claim \"Their first step was to extract the standing water to prevent further damage\" is grounded, hallucinated intrinsic, or hallucinated extrinsic based on the document provided.\n\nFirst, I need to look at the doc...
ade246b5-2813-481c-8451-bcec58ab1d3c	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim.\n Document: \"I recently experienced firsthand how quickly life can change when dealing with the coronavirus. My husband and I, both in our 40s and generally healthy, found ourselves in quarantine after falling ill following a ...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine the classification. The claim is \"I ended up in the emergency room, and my husband, who works in construction, went twice.\" \n\nFirst, I'll look at the document. T...
13cbcf52-737a-4ecf-8cb1-696451e505c1	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim.\n Document: \"The author shares her experience of grief during Mother’s Day after multiple pregnancy losses and emphasizes the importance of recognizing and supporting all types of mothers—whether they are dealing with infertil...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine if the claim is GROUNDED, HALLUCINATED_INTRINSIC, or HALLUCINATED_EXTRINSIC. The answer needs to be in XML format with specific structure.\n\nFirst, let me read the ...
f01c02ec-5c8c-4007-b2e4-0f8c4fb290b7	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim.\n Document: \"Bernard Hopkins, in an interview, discussed race in boxing, highlighting perceived genetic advantages of African American athletes. He questioned why Manny Pacquiao had not faced African American fighters with a \...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user wants me to determine if the claim is GROUNDED, HALLUCINATED_INTRINSIC, or HALLUCINATED_EXTRINSIC based on the provided document. \n\nFirst, I need to read the document carefully. The document mentions Bernard Hopkins disc...
d7650d53-446c-45af-86dd-0295dadc8f1d	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as one of:\n- GROUNDED: if the document fully supports the claim.\n- HALLUCINATED_INTRINSIC: if the claim contradicts the document or what it clearly implies.\n- HALLUCINATED_EXTRINSIC: if the claim i...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user wants to determine if the claim \"The genealogical record of Confucius's descendants was inscribed on UNESCO's Memory of the World Register in 2018\" is GROUNDED, HALLUCINATED_INTRINSIC, or HALLUCINATED_EXTRINSIC, based on...
23d8e722-8bab-4683-b32f-ca9e3d356118	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as one of:\n- GROUNDED: if the claim is fully supported by the document.\n- HALLUCINATED_INTRINSIC: if the claim contradicts the document or what it clearly implies.\n- HALLUCINATED_EXTRINSIC: if the ...	[ { "role": "assistant", "content": "<think>\nOkay, let's see. The document says that most staff writers are typically older than 26. The claim is the same as what's in the document. So, the claim is fully supported by the document. I need to check if there's any conflicting information. The document mentions...
1c0c6ec3-654a-48aa-b9b7-4693fa8baf63	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document which is a team meeting dialogue and a claim: \"The Road to Zamboria is based on the Prodigal Son parable.\"\n\nWe must decide if the claim is:\n- GROUNDED: if the document fully supports it.\n- HALLUCINATED_INTRINSIC: if it contradicts the...	[ { "role": "assistant", "content": "<think>\nOkay, let's see. The user provided a document and a claim, and I need to determine if the claim is grounded, hallucinated intrinsic, or hallucinated extrinsic. The claim is \"The Road to Zamboria is based on the Prodigal Son parable.\"\n\nFirst, I should look thro...
5d4e4a77-3fa0-49be-a710-368eb3f283e9	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as one of:\n - GROUNDED: if the claim is fully supported by the document.\n - HALLUCINATED_INTRINSIC: if the claim contradicts the document or what it clearly implies.\n - HALLUCINATED_EXTRINSIC: i...	[ { "role": "assistant", "content": "<think>\nOkay, let me try to figure this out. The user provided a document and a claim, and I need to determine if the claim is GROUNDED, HALLUCINATED_INTRINSIC, or HALLUCINATED_EXTRINSIC.\n\nFirst, I'll read through the document carefully. The document is about Slack's de...
1396f024-31b6-49b8-b7cb-823e3dd111f7	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. The claim is: \"Leeds won the Challenge Cup Final this season.\"\n\nWe must classify the claim as:\n- GROUNDED: if the document fully supports the claim.\n- HALLUCINATED_INTRINSIC: if the claim contradicts the document or what ...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine if the claim is grounded, hallucinated intrinsic, or hallucinated extrinsic based only on the document.\n\nFirst, I'll read through the document carefully. The claim...
a23cc9cc-b04b-4f91-be0e-f8494795747d	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. The claim is: \"Existing-home sales were set to rise by 7 percent.\"\n\nWe must decide if this claim is:\n- GROUNDED: if the document fully supports it (exactly as stated or clearly implied with the same numbers and context)\n-...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user wants to know if the claim \"Existing-home sales were set to rise by 7 percent\" is grounded, hallucinated intrinsic, or hallucinated extrinsic based on the provided document.\n\nFirst, I'll look through the document to fi...
4199574d-29ea-4f9a-8ad1-053f71f7b0c3	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as one of:\n - GROUNDED: if the claim is fully supported by the document.\n - HALLUCINATED_INTRINSIC: if the claim contradicts the document or what it clearly implies.\n - HALLUCINATED_EXTRINSIC: i...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine if the claim is GROUNDED, HALLUCINATED_INTRINSIC, or HALLUCINATED_EXTRINSIC.\n\nFirst, I'll read through the document carefully. The document says: \"Preserve every ...
c722a44e-e91f-492b-9ba1-17c01e75afd1	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document and a claim. We must classify the claim as one of:\n - GROUNDED: if the claim is fully supported by the document.\n - HALLUCINATED_INTRINSIC: if the claim contradicts the document or its clear implications.\n - HALLUCINATED_EXTRINSIC: if...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this problem. The user provided a document and a claim, and I need to determine the classification based on the document. The claim is \"Smartphone users' awareness of the distinction between Apple iOS and Android systems indicates that competit...
823d8805-ea30-4c40-ad21-99e8810ce714	[ { "role": "user", "content": "{\"instructions\": [\"You will be given a document and a claim.\", \"Decide whether the claim is 'GROUNDED', 'HALLUCINATED_INTRINSIC', or 'HALLUCINATED_EXTRINSIC' based ONLY on the document.\", \"Definitions:\", \" - GROUNDED: The claim is fully supported by the document. All ...	[ { "role": "assistant", "content": "<think>\nWe are given a document which is a transcript of an interview. The claim is: \"According to exclusive information from LIB, Peter has sent a termination letter to the group’s lawyer, Festus Keyamo (SAN), formally requesting the dissolution of the agreement between...	[ { "role": "assistant", "content": "<think>\nOkay, let's tackle this. The user provided a document and a claim, and I need to determine if the claim is grounded, hallucinated intrinsic, or hallucinated extrinsic. \n\nFirst, I'll read through the document carefully. The key part is the interview with the expe...