True enough, Raycpa. I’m not suggesting that Noah’s lineages would all have survived. I’m just suggesting that anyone prior to Noah could not have been the genetic Adam.
The OT is a kind of a family album, not a history of the entire human race. The tale of Noah is true as far as it goes, but other peoples’ literatures claim that people also survived the flood on high places and anything which could float for the better part of a year.