Creation science researchers and intelligent design theorists argue that wisdom teeth are not evidence of evolution because of the design perspective, degeneration, but not evolution, functional argument, microevolution vs. macroevolution, and alternative explanations. They propose that wisdom teeth are part of an originally well-designed human anatomy. According to this view, early humans had larger jaws that could accommodate these extra molars, which were useful for a diet consisting of tougher, unprocessed foods. They argue that the problems associated with wisdom teeth today (such as impaction and crowding) are due to degeneration rather than evolution. This degeneration could be attributed to changes in diet, jaw size, and overall health over generations, rather than an evolutionary process. Some proponents suggest that wisdom teeth still serve a functional purpose for some individuals, indicating that they are not vestigial or useless remnants of evolution. They argue that the presence of wisdom teeth in some people without issues suggests variability in human design rather than evolutionary leftovers. They may accept microevolution (small changes within a species) but reject macroevolution (large-scale changes that result in new species). From this perspective, the changes in jaw size and dental issues are seen as microevolutionary changes that do not support the broader claims of human evolution from common ancestors with other primates. They often propose alternative explanations for the presence of wisdom teeth that do not rely on evolutionary theory. For example, they might suggest that wisdom teeth were part of an original design that has become problematic due to changes in human lifestyle and environment. Creation science researchers and intelligent design theorists view wisdom teeth as part of an original, well-designed human anatomy that has experienced degeneration over time, rather than as evidence of evolutionary processes.