Assertion 2.2: Many types of radiometric dating have error factors of several million years.
Analysis:
This is true, but irrelevant.
(i) As paleontologist Niles Eldredge responds:
A few million years sounds like a huge error, but a couple of million years one way or the other is a small error compared with the huge age calculated. Saying '380 million years plus or minus two million' is like thinking back to April from December and saying you can't remember whether something happened on the 19th, 20th, or 21st. (Eldredge 1982:103)
To help put things in perspective a different way, the error Eldredge describes is only slightly more than half a percent.
(ii) Even with an error factor of a few million years, radioisotopes consistently show that the earth is billions of years older than the 6,000-year-old earth the young-earth creationists desire.
References
Eldredge N. 1982. The Monkey Business: A Scientist Looks at Creationism. New York: Washington Square Press.