That doesn't explain why different isotope pairs produce the same age.
The real age is the issue. In the case of the KT layer for example the real age is probably about 4500 years ago. What is your age..66 million?!
Can you tell us why God couldn't create a rock with a K/Ar ratio near zero and a U/Pb ratio near 50/50?
Why didn't He make squirrels that eat whales? It is what it is. The ratios are just that...ratios...not ages. The only way we could get the ages you cite would be IF there was a same state past. You can't use ratios to prove a same state past. You are engaging in totally circular logic.
You still can't explain why my supposed belief system is able to make such accurate and repeatable predictions.
Totally inaccurate, and absolutely bogus years. Nice try. Now if you want a pat on the back for having imaginary years meet up somewhat cohesively in an imaginary same state past fantasy, well, I suggest you grow up.
If there wasn't a same state past, then how am I able to make such accurate predictions about the ratio of isotopes in rocks based on a same state past?
You can't. You could predict a certain amount of isotopes of certain kinds based on the patterns we see. But that is not ages in the way you claim at all. That just means that several thousand years ago there was a certain amount of isotopes already here! You want to claim they GOT here by decay and therefore claim great time. First you must prove a same state past, not go round and round a merry go round.
It has nothing to do with the amount of parent material all by itself.
Of course not, but it has to do with you assuming that the daughter all got here from the parent because you believe real hard in no creation and a same state past. There were both isotopes before the nature change I assume. They do not represent great age. (the only age would be the decay since the state change- very little)
A zircon with 1 mg of both U and Pb is quite old.
Nope. Young.
A zircon with 50 mg of U and no Pb is quite young.
Both are under 6000 years old so I guess it is young.
Why are those patterns exactly what we should see with a same state past? When we find patterns that fit exactly what our model says they should be, that is evidence for that model.
Wrong. That is evidence that you ascribe patterns of ratios to decay only..in other words a same state past. There was no 66 million years ago get over it. That is religion. Nothing really meets up and agrees there at all.
Then how do we find very old lava flows that solidified in place above sediments that have fossils in them?
Easy. The fossils were from before the time the lava flowed! So, for example if lava flowed at the time of the rapid continental separation, naturally it would cover some pre flood fossils.
If the decay rates were the same, then none of them should have minerals that have high levels of daughter isotope.
Who says there was any decay or decay rates? Prove it! How would you know? By looking at what are now daughter isotopes and applying you belief in a same state past, and claiming all that daughter material came to exist by present state decay rather than having existed before this state started!
Then why do we find daughter isotopes that are the product of decay?
Because they now ARE a product of decay! Not before this state started though I assume!