The primary authority for Answers in Genesis is the infallible Word of God, the Bible (see Q&A Bible). All theories of science are fallible, and new data often overturn previously held theories. Evolutionists continually revise their theories because of new data, so it should not be surprising or distressing that some creationist scientific theories need to be revised too.
The first article on this page sums up what the creationists’ attitude should be about various ideas and theories. The other articles provide examples of arguments that should no longer be used; some arguments are definitely fallacious, while others are merely doubtful or unsubstantiated. We provide brief explanations why, and/or hyperlinks to other articles on this Web site with more detailed explanations. We don’t claim that this list is exhaustive—it will be updated with additions and maybe deletions as new evidence is discovered. Many of these arguments have never been promoted by AiG, and some have not been promoted by any major creationist organization (so they were not directed at anyone in particular), but are instead straw men set up by anti-creationists. --Answers in Genesis [emphasis added]
I just stumbled across this fascinating page on the huge creationist organization Answers in Genesis's website. Although it is a strong advocate of young-Earth creationism (i.e. God created the Earth less than 10,000 years ago) it lists a number of arguments that creationists should not use since they are either untrue or "doubtful."
Interestingly, I've seen many of them used by creationists on my blog:
"Arguments we think creationists should NOT use"
‘No new species have been produced.’
‘Archaeopteryx is a fraud’
‘There are no beneficial mutations.’
‘Ron Wyatt has found Noah’s Ark’
"What arguments are doubtful, hence inadvisable to use?"
‘There was no rain before the Flood.’
‘Evolution is just a theory.’
‘The speed of light has decreased over time’
‘There are no transitional forms.’
‘Creationists believe in microevolution but not macroevolution.’
So, my creationist readers, if you won't believe me about these claims, perhaps you'll believe Answers in Genesis.
My non-creationist readers, I highly recommend checking the site out anyway -- it's fascinating. For example, I learned about Dr Russell Humphreys, a "creationist physicist" who "was inspired to develop a new creationist cosmology which appears to solve the problem of the apparent conflict [of being able to see millions of light-years away even though he doesn't believe that the speed of light has slowed significantly] with the Bible’s clear, authoritative teaching of a recent creation." I also learned that there is a International Conference on Creationism and that they claim to value the concept of peer review.