Based on what evidence? That's an conclusion based on the assumption that the Genesis narrative is a literal account of the origins of the biosphere. Geological evidence indicates a much longer time-table between the formation of the earth and the present. Fossil evidence indicates a gradual diversification of the species.
You're still trying to argue from a position of special foreknowledge, which is inherently unscientific. Science must be able to observe evidence before it can postulate on an explanation, and there is no possible way to observe an instantaneous act of Creation at a remote point in the past. All we can do is look at the fossils and rocks and give our best guess. And based on the evidence, the best guess that makes up our current understanding is a gradual diversification through genetic selection. Even if science has it wrong, it is not possible to change the current theories without a solid base of evidence against it or convincing evidence of a replacement theory.
Brackenzee, you have been mislead.
Strata are dated from fossils and fossils are dated from strata. This is circular reasoning and proves nothing.
There are issues to do with carbon dating related to the fact that the speed of light is decaying among other things.
When I studied logic at uni we used to talk about different types of proofs. These include 'proof by cases' and proof by contradition'
2 things that PROVE that the Earth is only young are oil wells and the magnetic field.
The incredible pressure found in oil and gas wells indicates they have been there less than 15,000 years. (Presumably, the oil or gas would have escaped long before then.)
Direct measurements of the earths magnetic field over the past 140 years show a steady and rapid decline in its strength. This decay pattern is consistent with the theoretical view that there is an electrical current inside the earth which produces the magnetic field. If this view is correct, then 25,000 years ago the electrical current would have been so vast that the earth's structure could not have survived the heat produced.