Common Creationist Criticisms of Mainstream Dating Methods
Most creationist criticisms of radiometric dating can be categorized into a few groups. These include:
Reference to a case where the given method did not work .
Claims that the assumptions of a method may be violated :
Constancy of radioactive decay rates .
Contamination is likely to occur .
1. Reference to a case where the given method did not work
This is perhaps the most common objection of all. Creationists point to instances where a given method produced a result that is clearly wrong, and then argue that therefore all such dates may be ignored. Such an argument fails on two counts:
First, an instance where a method fails to work does not imply that it does not ever work. The question is not whether there are "undatable" objects, but rather whether or not all objects cannot be dated by a given method. The fact that one wristwatch has failed to keep time properly cannot be used as a justification for discarding all watches.
How many creationists would see the same time on five different clocks and then feel free to ignore it? Yet, when five radiometric dating methods agree on the age of one of the Earth's oldest rock formations ( Dalrymple 1986, p. 44 ), it is dismissed without a thought.
Second, these arguments fail to address the fact that radiometric dating produces results in line with "evolutionary" expectations about 95% of the time (Dalrymple 1992, personal correspondence). The claim that the methods produce bad results essentially at random does not explain why these "bad results" are so consistently in line with mainstream science.
2. Claims that the assumptions of a method may be violated
Certain requirements are involved with all radiometric dating methods. These generally include constancy of decay rate and lack of contamination (gain or loss of parent or daughter isotope). Creationists often attack these requirements as "unjustified assumptions," though they are really neither "unjustified" nor "assumptions" in most cases.
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everything is cited and refrenced, even the christianity stuff.