disclosure-bureau/case/gaps/G-0001.md

schema_version	type	gap_id	canonical_title	gap_class	description	description_pt_br	detected_in	detected_by	detected_at	severity	investigative_impact	investigative_impact_pt_br	possible_explanations	recommended_actions	related_gaps	wiki_version
0.1.0	gap	G-0001	Pages 1–6 of DOW-UAP-D54 are bit-for-bit identical (same SHA-256)	unexplained-redaction	Pages 1, 2, 3, 4, 5, and 6 of the PDF `DOW-UAP-D54-Mission-Report-Mediterranean- Sea-NA.pdf` were converted to PNG at 200 DPI and produced six IDENTICAL files, all with SHA-256 `29030fd640030926c9e98e94f73a3fbc88cb9ac6739778b012eba120084ed1b7`. Visually, all six pages show the same image: solid black background (full-page redaction) with only the string "1.4(a)" in red at the top-left corner. The OCR (`pdftotext -layout`) of each page also produces only the text "1.4(a)". The most plausible hypothesis is that during the release process, six originally distinct pages (likely six different blocks of classified content) were ALL replaced by a single redaction template image, instead of each page having its own redaction overlay preserving sub-redacted structure.	As páginas 1, 2, 3, 4, 5 e 6 do PDF `DOW-UAP-D54-Mission-Report-Mediterranean- Sea-NA.pdf` foram convertidas em PNG @ 200 DPI e produziram seis arquivos IDÊNTICOS, todos com SHA-256 `29030fd640030926c9e98e94f73a3fbc88cb9ac6739778b012eba120084ed1b7`. Visualmente, as seis páginas mostram a mesma imagem: fundo preto sólido (redação de página inteira) com apenas a string "1.4(a)" em vermelho no canto superior esquerdo. O OCR (`pdftotext -layout`) de cada página produz apenas o texto "1.4(a)". A hipótese mais plausível é que durante o processo de liberação, seis páginas originalmente distintas (provavelmente seis blocos diferentes de conteúdo classificado) foram TODAS substituídas por uma única imagem-template de redação, em vez de cada página ter sua própria sobreposição preservando a estrutura sub-redatada.	dow-uap-d54-mission-report-mediterranean-sea-na/p001 dow-uap-d54-mission-report-mediterranean-sea-na/p002 dow-uap-d54-mission-report-mediterranean-sea-na/p003 dow-uap-d54-mission-report-mediterranean-sea-na/p004 dow-uap-d54-mission-report-mediterranean-sea-na/p005 dow-uap-d54-mission-report-mediterranean-sea-na/p006	archivist	2026-05-13T08:50:00Z	medium	Substitution by an identical template erases any residual visual structure (margins, headers, paragraph spacing, partial signature blocks) that might permit inference about the redacted content. This compromises forensic analysis of redaction patterns. For other documents in the corpus with partial redactions, it is possible to roughly infer the size/position of removed text — here that is impossible.	A substituição por template idêntico apaga qualquer estrutura visual residual (margens, cabeçalhos, espaçamento de parágrafos, blocos parciais de assinatura) que poderia permitir inferência sobre o conteúdo redatado. Compromete a análise forense de padrões de redação. Para outros documentos do corpus com redações parciais é possível inferir aproximadamente o tamanho/posição do texto removido — aqui isso é impossível.	explanation confidence_band Redaction template applied in bulk for all SECRET-classified pages medium explanation confidence_band Bug in release/redaction software that duplicated a single page image low explanation confidence_band Deliberate decision to uniform the appearance of fully redacted pages medium	Cross-check other documents in the DOW-UAP-D series to see if the pattern repeats Compare PDF metadata (xref, font subsetting, image XObject ids) between the 6 pages Check whether other corpus PDFs with all-redacted pages exhibit the same SHA collision	gap/G-0002	0.1.0

Gap G-0001 — Identical pages in DOW-UAP-D54

Anomaly detected via SHA-256 collision across 6 PNGs derived from 6 distinct pages of the original PDF. See description / description_pt_br in frontmatter.