Name: Anonymous 2007-02-16 1:02
All dating methods assume a closed system—that no isotopes were gained or lost by the rock since it formed. There is no way of knowing if this was the case. Moreover, whenever dates obtained from rocks are not acceptable to existing geologic theories, the assumptions are suddenly reversed, and we are told that those particular rocks must have become open systems! Obviously, uniformitarian geologists want to have it both ways.