More days, more AiG.
One expects creationists and Creation Scientists to dance around language where it comes to evolution, but so often it comes at the cost of either sounding like they don’t understand evolution, or using language that is meaningless if the listener doesn’t understand evolution. Or, perhaps more maliciously, relies on the ignorance of the user to even make the semblance of a point.
To wit, the linked article.
“But are there such things as beneficial mutations? In short, no, but let me explain.” Alright, friend–explain away. She goes on to detail how an improved resistance to antibiotics in bacteria often results in something something metabolism issues. She explains that the improvements come at a cost to survival in some other way. She explains that in the absence of antibiotics, nonresistant bacteria actually survive better.
This is the perfect example of evolution. Of survival of the fittest.
The thing is, antibiotic resistant bacteria don’t tend to grow in environments free of antibiotics. And that is exactly what evolution would predict. If every step of evolution was like a level up in World of Warcraft, where you get survival bonuses right across the board, every species would be perfect. But they aren’t.
Survival of the fittest, evolution in action, is all about small improvements that help you survive in the environment you are in. A Tibetan (the subject of another evolution-centric post I have made) won’t have the same survival traits that someone from Jamaica would.
Perhaps more real world examples are in order. Take the Cheetah; evolved almost purely for speed. The drawbacks is that they have very low stamina compared to other species, and sacrifice maneuverability due to the way their hip and shoulder joints work. They didn’t just get “Faster, stronger, better,” there was an obvious cost and an obvious benefit. They are not everywhere in the world, they evolved to fit a niche in the flat plains of Africa. Their survival traits would be worthless in the mountains for example.
Segue that into a mountain goat, which tend to be rather slow and comically awkward at times–but they are able to climb mountains in ways the boggle the mind. The thing is, if they lived in the same environment as a cheetah, in Africa, the goat would be eaten hilariously quickly. That is evolution.
MRSA doesn’t need to survive among non-resistant bacteria to be considered an evolutionary step. They have evolved to become the fittest survivor in hospitals, where antibiotics are used frequently.
The author of the linked article does not want to admit that, though. “One step forward for person A is one step back in situation B” is still evolution, even if they don’t want to use the word.
Perhaps even more egregious, then, is the paragraph where she states that while there are mutations that make people immune to HIV, and while we don’t know of any directly related drawbacks to being immune to HIV, they must be there because God. And I don’t even know where to go with that.
I know I am preaching to a group of people who mostly accept evolution, but I really wish I could just… I don’t know. Discuss what so many creationists think evolution is. They have said, frequently (and in some cases directly from the mouth of the prophet, Ken Ham), “That’s not evolution, that’s adaptation.” As though that is some kind of defense. As though adaptation is not the cornerstone of evolution. They are dancing around the words, which is fine in some cases, but it works because they actively campaign to make sure children (and by extension adults) don’t know any better.
“In addition, the detrimental effects may not be detrimental enough to affect the overall fitness of the individual.”
To paraphrase: “It isn’t really negative, but I really have a vested interest in convincing anyone who will listen that evolution isn’t real.” Oh, it might sound like I am being callous, but to fully appreciate the scope of it you have to look at the context.
“There are people who are immune to HIV, but it isn’t really evolution because there are drawbacks that are so small I can’t really quantify them.” That is focusing on the wrong part of that story so hard that I think I felt a gust of wind purely from the effort of it.
“Again, the mutations only improve a person’s chance for survival in a given environment (external or internal), such as if the person is exposed to HIV or cancer develops within a person’s body.”
More paraphrasing: “Yes, there is evolution, because evolution predicts that exact behaviour, but I choose to call it by a different name.”
And here is the worst quote. This quote is the true showing, the true face, of the creation scientist unmaked.
“… [F]or one thing, beneficial, information-gaining mutations would have to be a regularly occurring phenomenon and would have to “build” on previous mutations so as not to be “undone” and to keep the evolution going “uphill””
Evolution is not necessarily an uphill process.
Mutation can certainly undo other beneficial mutations.
Imagine a gene that makes me immune to a disease that was naturally wiped out 20 million years ago. When I evolve a new function (maybe my eardrums are 10% more sensitive or something, thus allowing me to hear the intruder in my house, thus allowing me to fend him off, thus allowing me to procreate), perhaps I lose that immunity. But you know what? I am now better equipped to survive in my current environment than I would have been with my less sensitive eardrum and immunity to a disease that no longer exists.
This happens all the time. Think of Darwin’s finches; when their beaks changed size and shape, it may have made them unable to process nutrients (ie: eat) as well on their parents’ home island, but that means absolutely nothing to them on their new island, because their beak is awesome at eating stuff on this island. They have lost viability in an irrelevant environment, but they have certainly improved their survival chances in their current environment.
The repetitive use of “in their current environment” is important, because it is no less evolution if you lose something that was no longer undergoing active selection pressure.
It is by this mechanism that land dwelling animals lost their gills, obviously great for surviving water based environments, in favor of better lungs. Better lungs granting longer stamina, less stress on the heart, less stress on the body. So what, we can’t breathe under water any more? I am glad I don’t live underwater, and I would still certainly call that an improvement.