Egyptian Archaeology, is the time-line for the 1st-12th dynasty solid?

Question

Is it possible that the timescale could be off by hundreds of years for the earlier Egyptian dynasties? Could the 12th dynasty have been 200 years later than traditional time scales? Could the 1st dynasty have been 900 years later than currently predicted? I received a book written by David Down and John Ashton that made these claims. I cannot find a scholarly critique on their views. Thanks for the help!

Answer 1

yes, the time lines may not be 100% accurate

Answer 2

Check Jewish history.