Although the authenticity of the e-mails was never confirmed, they generated enormous interest among Syrians hostile to the Assads.
Many Western and Chinese scholars have concluded that the documents are largely genuine, although their authenticity cannot be entirely proved.
Although its authenticity has been called into question, Discovery Channel's "Moonshiners" has frequently found itself to be among the top-rated cable shows on Wednesday nights.
Although the authenticity of the conversations could not be independently verified, they echo allegations previously made by other organizations, including the U.N. refugee agency (UNHCR).
Although the authenticity of the tape from an interview last week could not be independently verified, the voice resembled that on other recordings of Mr. Awlaki.
Although the authenticity of his age was attested to by many persons, including two celebrated Scandinavian actuaries, later investigations cast doubt upon the record.
The voice sounded like that of Mr. bin Laden's, although the authenticity of the tape could not be independently verified.
A video of a helicopter shot near Aleppo in May shows the distinctive smoke of what would appear to be a missile, although the authenticity of such recordings is difficult to prove.
For most readers seeking to picture the author of Pride and Prejudice, the face of Jane Austen is a watercolour painted by her sister Cassandra in 1810, right, although the authenticity of the sketch has remained contested.
Although the authenticity of the tasks may be questioned, the verbal reactions were controlled for three reasons.
The pamphlets, which purport to be from the pro-Moscow authorities in Donetsk, have caused alarm in the Jewish community, although their authenticity has not yet been verified.
