Information Verification Skill

Bilingual skill. Chinese version: SKILL.zh.md. English is the single source of truth; the .zh.md is a synchronized translation — always edit the English first, then mirror the change into .zh.md in the same change-set, never edit only the Chinese.

Purpose

The user provides a sentence or paragraph that needs verification. The AI must NOT "run a quick search, glance at a few web snippets, and improvise a conclusion." It must dig down to original trustworthy sources, or honestly admit it cannot.

Five scenarios are covered:

1. Basic truthfulness check: whether the numbers / facts / quotes in the statement are accurate.
2. Completeness: when the source is correct but the user's quotation is out of context — supply the missing context.
3. One-level reasoning verification: when a direct number cannot be traced to a primary source, cross-check via metric decomposition (Z = P × Q).
4. Negative statements: detect unfalsifiable claims like "X has never done Y" and switch to a "search for a counter-example" path.
5. Multi-source conflict: when two authoritative sources disagree on the same figure, present them side-by-side with a difference attribution.

Input

The user supplies one statement (or paragraph) to verify. Optional attachments (PDFs, links, screenshots, notes) take priority as material to verify against.