A male may prove an authenticity.Logical formLearned from3 sentences. (Government officials) may challenge an authenticity of a video.Logical formLearned from3 sentences. A person may speak to an authenticity of an audiotape.Logical formLearned from3 sentences. An authenticity may pertain-to a legal appeal.Logical formLearned from3 sentences. Doubts can be about an authenticity of a legal appeal.Logical formLearned from3 sentences. A world-city may confirm an authenticity of a trove of (computer documents).Logical formLearned from3 sentences. An authenticity may pertain-to intelligence.Logical formLearned from3 sentences. (Intelligence agencies) may confirm an authenticity.Logical formLearned from3 sentences. An information may confirm an authenticity of a statement.Logical formLearned from3 sentences. Doubts can be about an authenticity of some paintings.Logical formLearned from3 sentences. A foreign ministry may deny an authenticity.Logical formLearned from3 sentences. An official may confirm an authenticity of a document.Logical formLearned from3 sentences. A US-city may verify an authenticity of a threat.Logical formLearned from3 sentences. Persons may like authenticity.Logical formLearned from3 sentences. A (vice president) may vouch for an authenticity of a tape.Logical formLearned from3 sentences.