# Fact Check

> Verify a specific claim by searching for evidence across web and academic sources.

Verify a specific claim by searching for evidence across web and academic sources. Use when the user asks to verify, fact-check, or confirm a statement.

- Page: https://ss33.ai/skills/collaborative-deep-research/fact-check-59646662459
- Publisher: collaborative-deep-research
- Category: [Science & Education](https://ss33.ai/skills/category/science-and-education-pic2u9) › [Research & academia](https://ss33.ai/skills/category/science-and-education-pic2u9/research-and-academia-wcjltx)
- License: Apache-2.0
- Source: https://github.com/collaborative-deep-research/agent-papers-cli/blob/23a1941893d035d85735999904f178deb2e25497/.claude/skills/fact-check/SKILL.md

## Skill

SKILL.md: https://ss33.ai/api/v1/ss33/download/collaborative-deep-research/fact-check-59646662459

Fact-check the following claim: "$ARGUMENTS"

## 1. Decompose

Break the claim into specific, verifiable sub-claims. List them explicitly before searching.

## 2. Search for Evidence

For each sub-claim:
```
paper-search google web "<sub-claim as question>"
paper-search semanticscholar snippets "<sub-claim keywords>"
paper-search semanticscholar papers "<sub-claim keywords>" --limit 5
```

## 3. Verify Sources

For each promising source:
```
paper read <arxiv_id> <relevant section>   # for academic papers
paper-search browse <url>                   # for web pages
```

Prefer primary sources (original papers, official data) over secondary reports.

## 4. Assess

For each sub-claim, assign a verdict:
- **Supported**: strong evidence from multiple reliable sources
- **Partially supported**: some evidence, with caveats
- **Unsupported**: no evidence found, or evidence contradicts the claim
- **Uncertain**: insufficient evidence to judge

## 5. Report

Present:
- The original claim
- Each sub-claim with its verdict and supporting evidence
- An overall assessment
- All sources cited with URLs

## Guidelines

- Always cite specific sources — never state a verdict without evidence.
- Distinguish between "no evidence found" and "evidence contradicts."
- Note the quality and recency of sources.
- If a claim is about a specific paper, read that paper directly rather than relying on summaries.