Wasn't someone supposed to trot out their
best argument?
If this is the best one you've got maybe you should put some more into it.
1) We know that there are conditions and processes which can create c-14 in the upper atmosphere. So why postulate that some isn't?
2) We measure the amount in older things and it is appropriate for the independently determined age. Can you show how this would be true for some amount of "primoridial" (there form the beginning at 6,000 years ago) C-14?
3) How much of the C-14 would be "primordial" in your hypothosis?
4) Why do somethings date so well by other means to older than 6,000 years and why does this agree with C-14 dating? In what way would it be thrown off by the mix of new and old C-14?
5) If the earth is less than 6,000 years old why is some of all carbon samples the radioistope C-14? Why is there effectivly non after about 50,000 years?
Now then, what about other short lived isotopes? Why are only very long lived elements still present or the only place short-lived ones are found isassociated with their parent elements? Shouldn't they all be there? Shouldn't the only ones missing be those with half lives less than 1 or 2 thousand years?
This is the *best* you've got? sheesh