Tom Larkin writes:
The dates associated with the MRCA's is not important, what is important is that a Most Recent Common Ancestor existed while other men and women existed. This is only a coincidental argument and not my primary argument.
What we are saying is that if there was no real biblical Adam and Eve there would still be a mitochondrial Even and a Y-chromosome Adam. Any sexually reproducing population will have these two MRCA's. There is a set of these Adams and Eves for chimps, bears, bats, and so on. They are simply a product of pedigree collapse, where maternal and paternal lines tend to end which leaves just one line remaining.