That's were you are mistaken. First of all we have alternative methods such as ice-cores, or varves which can be used to check the dating results, secondly we find similar dating results for the
various radiometric methods, thirdly the implications of a varying decay rate would be immense and fourthly we have recently observed light from a Supernova 170000 light years away and it was found that the decay rates for Co had not changed in the last 170,000 years. Surely a problem if one were to propose a young earth ?
Vernon: <<You are surely not offering the fact of these linkages as firm evidence for
the constancy of all, or of any one of them over the period before
measurements became possible. I have already suggested that this
represents a fundamental and staggering 'act of faith' on the part of
evolutionary scientists. How can it possibly be otherwise?>>>
It could be staggering act of ignorance on the part of the YEC ?
Just a hunch though...