Rafael Medoff concludes that 'actually there is no evidence that the Mufti's presence was a factor at all; the Wisliceny hearsay is not merely uncorroborated, but conflicts with everything else that is known about the origins of the Final Solution.' Bernard Lewis also called Wisliceny's testimony into doubt: 'There is no independent documentary confirmation of Wisliceny's statements, and it seems unlikely that the Nazis needed any such additional encouragement from the outside.' Bettina Stangneth called Wisliceny's claims "colourful stories" that "carry little weight".