There is also the Dunning-Kruger effect where:
"Across four studies, the authors found that participants scoring in the bottom quartile on tests of humor, grammar, and logic grossly overestimated their test performance and ability. Although test scores put them in the 12th percentile, they estimated themselves to be in the 62nd."
Dunning—Kruger effect - Wikipedia
That is, those who know the least think they are experts while the experts doubt their own expertise. Those most ignorant of science, and by extension evolution and the age of the Earth, will be certain that they are right due to their own ignorance.