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authenticity noun

VERB + AUTHENTICITY cast doubt on, doubt Some journalists have cast doubt on the authenticity of the official version of events. | check, test | confirm, establish, prove, verify

PHRASES a certificate of authenticity Despite its certificate of authenticity, the painting was found to be a fake. | a debate over the authenticity of sth There has been some debate over the authenticity of his will. | of doubtful authenticity a document of doubtful authenticity