Contradiction to "known history," isn't the same as the historical account given in the Holy word of God.
When a "new" revelation or a book is found that nullifies or changes His Holy Word then....should you listen to it?
Mark 13:22-23 For false Christs and false prophets shall rise, and shall shew signs and wonders, to seduce, if it were possible, even the elect. But take ye heed: behold, I have foretold you all things.
All things He told us are written. New revelations, deeper spiritual understanding, of what is written are given us by the Holy Spirit but the nexus never alters.
We have to remember the tree of knowledge of good and evil. Within it's knowledge will always be some truth but.......therein lies it's seduction.