All that it would take is to prove age dating wrong which is easily done.

Question: If all of the universe came from the same matter in the Big Bang, why does not all matter date back to that Big Bang? If age dating was 100% accurate, that all planets, and all matter would date the same age. But they don't do they?

A closer more likely event that shows age dating wrong. The moon is said to have formed from the earth from a meteor impact. So the moon is of the same matter as the earth, correct? Why the age difference?

Is there such a thing as cross contamination in age dating? Yes there is. What this means is that if a fossil, that dates a few thousand year old, is buried in a geological layer that dates a millions years old. Given time the layer will cross contaminate the fossil to date the same age as the layer does. This is why layers date the fossils, and fossils date the layers so well.