Evidence Grading

Evidence grades indicate confidence in each statement and dataset entry. The grading rubric is intentionally conservative.

Grades

• A: Reproducible from public sources with direct citations and stable identifiers.
• B: Reproducible with minor assumptions or indirect source mapping.
• C: Plausible but partial evidence, pending confirmation.
• D: Working hypothesis only; not suitable for downstream claims.

Usage Rules

• Claims in high-level summaries should not exceed the lowest evidence grade of supporting items.
• Ambiguous or contradictory inputs are preserved with a note instead of forced resolution.

Related pages: Citation Policy, Data Quality Assurance, Limitations and Biases.

External references: ISO 5725 (accuracy concepts), NIST.