Fact-Checking Policy
Our Commitment
Accuracy is the product we sell, even though everything here is free. A quiz site that teaches wrong facts is worse than no site at all, so verification is built into every stage of our workflow rather than bolted on at the end.
Source Hierarchy
We rank sources in tiers. Tier one: primary and official sources — record keepers, official institutions, museums, governing bodies, UNESCO listings, official award databases. Tier two: established encyclopedias and reference works. Tier three: reputable journalism and specialist publications. Claims are anchored to the highest tier available, and tier-three claims are corroborated by at least two independent sources before use.
Verification Workflow
Every guide passes three checks. First, the dossier check: a writer assembles sources and logs where each key fact comes from. Second, the edit check: an editor re-verifies names, dates, figures and quotes against the cited sources, and tests every practice question to confirm exactly one answer is defensibly correct. Third, the update check: when an article is revised, time-sensitive facts are re-verified even if the section being edited is unrelated.
Handling Disputed Facts
Some quiz staples are genuinely contested — the world's longest river is the classic example. Where authoritative sources disagree, we present the mainstream answer, name the rival claim, and explain why the dispute exists. We never silently pick the convenient option.
Corrections
If we get something wrong, we fix it. Corrections are made directly in the article text with the last-updated date refreshed. Report an error via our Contact page with the page URL, the fact in question, and a supporting source if you have one — sourced corrections are verified and published fastest.