One professor argued that the problems with evolution are not so significant. Most theories have failures here and there, or at least have limited application. So what if evolution has some unanswered questions, should we therefore throw it out? Of course not:
So when Hunter points to the latest understanding of evolution, notes the failure of the tree of life, and then wants to declare that the entire theory of evolution should be declared a failure, he just looks desperate. His audience, which consists mostly of YECs, is willing to believe his nonsense. But face it, Cornelius, you aren't even trying to win any converts, you're just preaching to the choir. If you try to flaunt your stuff at a professional biology conference, people will shrug you off as a crackpot. And they will be right.
Evolutionists often use this argument. They claim evolution is a fact, and when you point out that it has significant problems and comes nowhere close to being a fact, they shift the burden of proof to you. You must demonstrate evolution to be false. Otherwise you are desperate and a crackpot.
The other professor repeated much the same argument, saying that common descent has not been falsified:
Basically, creationists who are desperate to avoid admitting common descent like to point to exceptions to a strict tree. Those exceptions are nevertheless other sorts of genealogy connecting the species. This they are at pains not to mention. Then they say that a (perfect) tree has been invalidated. That leaves their audience thinking that it has been shown that there is no common descent. Which it hasn't been. They are being disingenuous.
The professor then made the fallacious argument that common descent is demonstrated by non random relationships between the proteins species. You can read more about that here.
If you are new to the evolution debate you might wonder why evolutionists do not simply acknowledge the painfully obvious fact that evolution is not a fact. It is not as sure gravity and in fact there are significant questions and problems with evolution. Why don’t evolutionists admit to the truth of how the science bears on their theory?
The answer is that evolution is not about the science. At issue here is not merely the status of another scientific theory. Evolutionists won’t be swayed by the evidence because doing so—and confessing that evolution is not overwhelmingly supported by the evidence—would immediately expose evolutionists to all kinds of possibilities which they simply cannot accept. An evolutionist can no more change his mind than could a cultist. Evolution is underwritten by a religious worldview—it is a metaphysical theory, not at scientific theory. As such it may lose every battle, but it cannot lose the war.