Pin the Tail on the Donkey Dating

Scientists have demonstrated that past carbon dating reports could be wrong by thousands of years. The original assumption was that decay rates from C14 to C12 in the atmosphere were constant. Comparisons today against a new uranium dating technique show there must have been extremely large variations in atmospheric C14 in the past.

References:
Science, June 29, 2001, pp. 2443-2444, 2453-2458

Creation application: Isotope decay rates are used to date rocks, carbon dating is used to date, "once living" organisms or any other item that contains C14 . Considering how many times decay rates have delivered inconsistent dates you would think one would quit worshipping these techniques. Too many assumptions are made in this process to promote such dates as facts: A) We don't know if any of the parent or daughter element has been added or taken away, B) We don't know that decay rates have remained steady, C) We don't know how much of the daughter element may have been present to start with. How many times were you warned of this in your schools science textbook?