Did you understand what I said about multiple independent dating methods being used? That is how assumptions are verified.
I’ve addressed this claim before on this forum.The rock samples in question were sent by Steve Austin et al for K-Ar dating to Geochron Laboratories of Cambridge, Massachusetts, who, at the time, stated this on their website:
Samples less than 5 M.Y. old, or containing less than 0.1%K will incur a 50% surcharge, reflecting the special care and additional analyses required. We cannot analyze samples expected to be younger than 2 M.Y.
It pains me to have to say so, but this kind of gaming the system is thoroughly dishonest, and no matter what we believe about the age of the earth, we must not give claims such as this any place whatsoever in our Christian witness.