No archaeological evidence corroborating his existence or identity has been found. Additional details by Norris provided further corroborating evidence to support his confessions. Evidence of distress can be used as corroborating evidence. Of note, there had been significant other evidence of guilt corroborating the conviction. Qualification of corroborating evidence is sometimes raised as philosophically problematic. There is a lack of direct evidence of slave traffic, but corroborating evidence exists. Similar apocryphal stories exist of Pythagoras and Plato traveling to Egypt with no corroborating evidence. In absence of any corroborating evidence, the historical accuracy of this account is uncertain. Subsequently, all charges against them were dropped for lack of corroborating evidence. These charges would themselves be dropped due to a lack of corroborating evidence. He detailed the attack, corroborating the physical evidence at the scene. Most explanations post-date the first publication of the rhyme and have no corroborating evidence. Others contain very little to no corroborating evidence to back up the stories. For the first time, immigration judges can require an applicant to produce corroborating evidence (. Under suit for defamation filed by Hiss, Chambers produced documents corroborating his allegations.