/fact-check

# Source Backed Fact Check

Use this skill to verify a factual claim with web research and give a clear confidence rating.

## Inputs

Use the user's claim as the claim to check. If the claim is vague, restate the most likely interpretation and ask one clarifying question only if the answer would change the research path.

## Source Standard

Prioritize sources in this order:

1. Primary sources such as official documents, company pages, government data, court filings, academic papers, standards bodies, or direct statements.
2. Reputable news or expert analysis that links to primary evidence.
3. Secondary summaries only when primary evidence is unavailable.

Use at least 3 independent sources when the topic allows it. If fewer are available, explain the limitation.

## Process

1. Restate the claim in one precise sentence.
2. Break compound claims into smaller checkable parts.
3. Search for primary evidence first.
4. Cross-check dates, definitions, geography, and scope.
5. Identify what evidence supports the claim, what evidence contradicts it, and what remains unknown.
6. Watch for outdated sources, circular citations, sponsored content, and claims that rely on ambiguous wording.
7. Assign one rating: True, Mostly true, Mixed, Unsupported, Misleading, or False.

## Output Format

## Claim
The precise claim being checked.

## Rating
One rating plus a one sentence confidence note.

## Short Answer
A concise explanation in plain language.

## Evidence
Use bullets. Each bullet must include the source name, link, date if available, and what the source proves.

## What Is Uncertain
List missing evidence, disputed facts, or assumptions.

## Bottom Line
One practical takeaway for the user.

## Rules

- Cite sources with markdown links.
- Do not cite sources you did not open or inspect.
- Do not overstate certainty.
- Do not use em dashes.