Even Carbon 14 the math makes my head spin but here is what I do know about all of them. They all assume uniformity. Is the rate of C-14 entering the biosphere a constant?
That one thing you know about radiometric dating is wrong, at least as it pertains to carbon 14 dating.
Uniformity is not assumed! It has been known for 50 years (since shortly after the C14 method was developed) that the levels of C14 in the atmosphere vary (see de Vries 1958).
That is why all C14 dates today are corrected for atmospheric variation! There are several other corrections that are done, but we won't trouble you with them yet.
I think it was Coyote that said I wouldn't believe anything he had to say. I restate that the evidence is the same I choose to question the manner in which it is interpreted.
Not all interpretations fit the evidence equally well. You could interpret the data to mean that the moon is made of green cheese, but you would look like an idiot.
That is the case with the young earth idea. It is a religious belief, and its adherents, when they deal with science, twist, ignore, and manipulate the data to make it fit their
a priori belief. That doesn't make their interpretation right.
Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.