It (6000 years) is either in the book or it isn’t.
Got any other straw dogma from the temple of Y.E.D. you’d like to try and prop up?
It's there. Anyone familiar with this argument knows exactly how it is there and has decided that either God isn't quite awesome enough to pull off such a feat or that it would be deceptive to pull off such a feat and not leave proof. Even the pope said "God isn't a magician and can't do it".
I and the rest of my fellow fundamentalist Christians are people of faith who believes that the universe is barely more than a weekend project to The Lord God Almighty.