mindmap root((证实)) confirm implies the removing of doubts by an authoritative statement or indisputable fact: ~ed reports of troop movements. corroborate suggests the strengthening of evidence that is already partly established or accepted: witnesses ~ his story. substantiate implies the offering of evidence that demonstrates or proves a contention: claims that have yet to be ~d. verify implies the establishment of correspondence of actual facts or details with those proposed or guessed at: all statements of fact in the article have been ~ied. authenticate implies establishing genuineness by adducing legal or official documents or expert opinion : handwriting experts have ~d the diaries. validate implies establishing validity by authoritative affirmation or certification or factual proof: to ~ a passport.