Source hierarchy
Important claims should rely on first-party documents whenever available. Credible independent research can provide context but should not replace the primary source.
- S1 official sources
- S2 credible independent sources
- S3 leads requiring confirmation
Scope and freshness
Dynamic facts must identify market, product, tier, time point, checked date and review date.
Corrections
Material changes remain visible through update dates and correction notes. Silent correction is not appropriate for a decision-relevant error.