None of the original documents of the New Testament is known to scholars to be extant; and the existing manuscripts differ from one another. The textual critic seeks to ascertain from the divergent copies which form of the text should be regarded as most conforming to the original. The New Testament has been preserved in three major manuscript traditions: the 4th-century-CE Alexandrian text-type, the Western text-type, and the Byzantine text-type, which includes over 80% of all manuscripts, the majority comparatively very late in the tradition.