QUESTION · ANSWERED BY THE EVIDENCE · BR-PRES-2026

Did abstention fall between the first and second rounds of 2026?

Yes. Abstention was 21.08% of registered voters in the first round and 19.22% in the second, 1.86 percentage point(s) lower. The change is derived; its cause is not established.

State: ConfirmedCase BR-PRES-2026

Short answer

Confirmed

Yes. Abstention was 21.08% of registered voters in the first round and 19.22% in the second, 1.86 percentage point(s) lower. The change is derived; its cause is not established.

Ledger claim: Abstention in the second round was lower than in the first

Proof chain

Proof chain: the claim on top; below, every item in favour, against and of context, with state, source and hash. The full text follows.

In favour (1)

Derived calculation
Cálculo: abstention_pct = 100 * abstention / electorate; fell = abstention_pct_t2 < abstention_pct_t1
Derived evidence from a primary source (tse-6257-br-u), with URL, method declared, no observation date. No other evidence on the same side. No conflict recorded.
Formula abstention_pct = 100 * abstention / electorate; fell = abstention_pct_t2 < abstention_pct_t1
Calculated value {"abstention_pct_t1":21.0836,"abstention_pct_t2":19.2188,"fell":true}
- Observed Resultado consolidado do Brasil, 1º turno · tse-6257-br-u
- Observed Resultado consolidado do Brasil, 2º turno · tse-6258-br-u
- Observed tse-6257-br-u · resultados.tse.jus.br · SHA-256 2866703eb4fc0ad6f17f0e081a00ab1175490b0786325e700cff1d8b40d25bca
- Observed tse-6258-br-u · resultados.tse.jus.br · SHA-256 67fae708b0c7977fc9847d36100c63313621bff971178c48f2da99969707c263
Confidence factors (no aggregate score)
Source type
official_results_file
Primary or secondary
primary
Authority
TSE
Method
cálculo determinístico sobre itens observados
Traceability
source_url_only
Independence
single_evidence_on_this_side
Freshness
unknown
Reproducibility
formula_declared
Corroboration
0 on the same side, 0 distinct source(s)
Conflicts
none recorded

Against (0)

No evidence against is recorded.

Context (0)

No context item.

What is observed, derived and unknown

Observed: Resultado consolidado do Brasil, 1º turno
Resultado consolidado do Brasil, 2º turno
source tse-6257-br-u
source tse-6258-br-u
read from a primary source with URL and SHA-256 checked
Derived: Cálculo: abstention_pct = 100 * abstention / electorate; fell = abstention_pct_t2 < abstention_pct_t1 in favour
a declared calculation over observed items
Unknown: No evidence against is recorded. The absence of a contrary item confirms nothing by itself: confirmation comes from the evidence in favour.
"Cálculo: abstention_pct = 100 * abstention / electorate; fell = abstention_pct_t2 < abstention_pct_t1" is a calculation: it has no observation date of its own; its inputs do.
a legitimate absence: no collected source supports the item

What would change the answer

It is already confirmed by the evidence in favour. The state would change if the TSE published a corrected file (with another SHA-256) with a different result, or if observed evidence against entered the chain; today 0 item(s) against are recorded.

Sources in the chain

Official files cited in this chain, with SHA-256 checked when the page was generated.
Id	URL	Downloaded at	SHA-256	State
`tse-6257-br-u`	https://resultados.tse.jus.br/oficial/ele2026/6257/dados/br/br-c0001-e006257-u.json	2026-11-02	`2866703eb4fc0ad6f17f0e081a00ab1175490b0786325e700cff1d8b40d25bca`	Observed
`tse-6258-br-u`	https://resultados.tse.jus.br/oficial/ele2026/6258/dados/br/br-c0001-e006258-u.json	2026-11-02	`67fae708b0c7977fc9847d36100c63313621bff971178c48f2da99969707c263`	Observed

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