At #10, the author quotes ...
Genesis 17:17 Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?
... and says Abraham thinks it is "biologically impossible for someone to have a child past the age of one hundred."
Yet the author goes on to point out that Abraham's father Terah had Abraham when he was 130.
So why would Abraham think it is "biologically impossible"?
And in fact, Abraham went on to have eight children.
So if Abraham did indeed think that, then Abraham was wrong.
The author goes on to say that, when God told Abraham he was going to have a child, Abraham should have replied to God, "Many people alive are still having children in their old ages, so having a child at the age of one hundred is perfectly normal."
Of course, this reply is out of place, since the conversation would go like this:
God: Sarah is going to have a son.
Abraham: Many people alive are still having children in their old ages, so having a child at the age of one hundred is perfectly normal.
That's like telling your son he's going to get his drivers license at the age of sixteen, and he comes back with, "Many teenagers alive are getting their drivers licenses in their teens, so getting my drivers license at the age of sixteen is perfectly normal."
It doesn't make sense.
The author is basing his whole premise on the [incorrect] assumption that Abraham is thinking it is "biologically impossible" for he to have a child.