Well, first there is the hypothesis that god made the world in seven days. Stands word by word in the bible and is a very detailed and exact timespan. And then we have the detailled bloodline back to adam and eve. There are no gaps in the bloodline. All members fine listed one by one (which makes it also hard to incorporate 99% of the rest of the human population into that by the way. Proof of another lie ... ). Now let's calculate the generations in years. Makes around 5000 years plus seven days. Oh wait, eight days. He had a little rest ...