Tab 5 — Sources

Sources

Everything above traces to something here. Sources are grouped by reliability tier — primary and legal first, then quality journalism, data and models, academic work, and historical context — each with a line on why it matters. Where I couldn't verify a link, I say so.

Tier 1 — Primary / legal / official

Tier 2 — Quality journalism

Tier 3 — Data & models

Tier 4 — Academic

Tier 5 — Historical context