We publish our audit record because accuracy claims should be checkable. Every entry on this site runs through an automated fact-audit pipeline (accuracy audit → source-grounded repair → visual QA); this page is generated from that pipeline's own report, not written by hand.
Last full accuracy audit: 2026-08-30 · 10 entries checked · 8 flagged · 13 issues confirmed · 8 corrected · 5 still open
Espírito Santo — The largest city by population is Serra, not Vila Velha.
Espírito Santo — Fundão is not typically considered part of the core Greater Vitória metropolitan region.
Goiás — The entry states that Goiás borders Bahia, but Goiás does not share a border with Bahia; the correct border state is Bahia's neighbor Tocantins, which was part of Goiás until 1988.
Maranhão — The entry states that after the separation of Grão-Pará in 1772, the remaining entity was renamed 'Estado do Maranhão e Pará', but it was actually renamed 'Estado do Maranhão e Piauí'.
Mato Grosso — The entry states Mato Grosso accounts for 50-55% of national cotton production as of 2018, but the correct figure is 65-70%, and Bahia has not surpassed Mato Grosso in cotton production.
Mato Grosso do Sul — The claim that the state is still commonly referred to as 'Mato Grosso' in colloquial speech is inaccurate; Mato Grosso do Sul is consistently referred to by its full name or abbreviation 'MS', and calling it 'Mato Grosso' would be incorrect as that refers to
Mato Grosso do Sul — The statement that the Guarani-Kaiowá people were first contacted by non-indigenous peoples in the 1800s is misleading; historical records show contact with Jesuit missions and bandeirantes in the 1600s and 1700s.
Paraná (state) — The claim that Ontiveros was founded near the Guaíra Falls is incorrect; it was founded near the confluence of the Paraná and Piquiri rivers.
Paraná (state) — The statement that Paraná's GDP ranks 5th behind São Paulo, Rio de Janeiro, Minas Gerais, and Rio Grande do Sul is misleading because Paraná has often surpassed Rio Grande do Sul in recent years, making the ranking variable.
Acre (state) — The time difference from Brasília should state 'Two hours behind Brasília' or '−2 hours', not just 'Two hours'.
Acre (state) — Acre was not united in 1920; the territory was unified under Brazilian administration in 1904 after the Treaty of Petrópolis.
Alagoas — The Dutch invasion of Alagoas began in 1630, but the claim that they were expelled in 1645 after intense fighting in Porto Calvo is incorrect; the fighting in Porto Calvo occurred in 1637, and the final expulsion of the Dutch from the region was in 1654.
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