WHAT IF:
1) The Adam of Genesis 2 & 3 was not "the first man" that GOD Created;
2) Cain did not marry his sister, nor his neice, or even a cousin;
3) The "sons of God", in Genesis 6, were not Angels ('fallen' or otherwise);
4) Noah's 3 sons were Triplets;
5) It didn't take Noah 120 years to...