PracticeSource IntelligenceOne scored question.A think-tank memo cites a newspaper, which cites the same think-tank memo. What is that pattern called?Independent corroboration, because two separate outlets carried itA primary source, because the newspaper published the original textSource laundering — circular citation that hides the single originPeer review, because the memo was examined before republicationKeys 1 to 4Tested in Independence and Laundering
