the fiction of storytellers (qussa). "We have seen what half a century of story-telling could achieve between Ibn Ishaq and al-Waqidi, at a time when we know that much material had already been committed to writing. What the same processes may have brought about in the century before Ibn Ishaq is something we can only guess at." Overall, Cook takes the view that evidence independent of Islamic tradition "precludes any doubts as to whether Muhammad was a real person" and clearly shows that he became the central figure of a new religion in the decades following his death. He reports, though, that this evidence conflicts with the Islamic view in some aspects, associating Muhammad with Israel rather than Inner Arabia, complicating the question of his sole authorship or transmission of the Quran, and suggesting that there were Jews as well as Arabs among his followers. Cook's fellow revisionist Patricia Crone complains that Sīrat is written "not by a grandchild, but a great grandchild of the Prophet's generation", that it is written from the point of view of the ulama and Abbasid, so that "we shall never know ... how the Umayyad caliphs remembered their prophet". While Crone argues that Muhammad was a person whose existence is supported by various sources, she takes a view that Muhammad's traditional association with the Arabian Peninsula may be "doctrinally inspired", and is put in doubt by the Quran itself, which describes agricultural activity that could not have taken place there, as well as making a reference to the site of Sodom which appears to place Muhammad's community close to the Dead Sea. Concerning the dates of Muhammad's life, Lawrence Conrad writes that "well into the second century A.H. [Islamic] scholarly opinion on the birth date of the Prophet displayed a range of variance of 85 years. On the assumption that chronology is crucial to the stabilization of any tradition of historical narrative, whether transmitted orally or in writing, one can see in this state of affairs a clear indication that sīra studies in the second century were still in a state of flux". Since second century A.H. scholarly opinion is the earliest scholarly opinion, and assuming the closer scholars were to the actual event the more likely their sources are to be accurate, this suggests a surprising lack of information among Islamic scholars about basic information on Muhammad. Robert Hoyland suggests his historical importance