Secular arguments supporting the use of radiometric dating in defining natural history have been rebuffed by many creationist critiques. However, recently, several young-earth creationists have suggested that radiometric dating can be accepted with one or more episodes of accelerated nuclear decay having occurred during Earth’s past. A number of theoretical and practical problems face this hypothesis, such as excessive heat generation, variability in the rate of nuclear decay among radioisotopes, and, perhaps most important, the lack of any radiometric age-date conversion factor that would allow the use of secular dating results in creationist field work.