Sherlock:
The one central feature of all “arguments from design” is the insertion of a supernatural cause for an unexplained event or fact. (In formal logic this is called the argumentum ad ignorantiam fallacy, literally “argument according to ignorance.”) In the current incarnation, this unexplained fact is called “irreducible complexity” and refers to complex (i.e. multi-part) biological structures whose individual parts serve no independent function. From this observation, the creationists leap, as they always do, to the conclusion that biological life must have some supernatural, or perhaps extra-terrestrial, creator.
This is a gross mischaracterization of the works of people like Michael Behe and William Dembski. I’ve read a bit of the leading intelligent design theorists, and
none of them ever go from “irreducible complexity” directly to “God did it!”
What they do is much more modest. They make a cogent observation, such as, “Current models of evolutionary theory cannot explain how an irreducibly complex system could evolve incrementally” or “The degree of specified complexity in this protein chain is too great to have ever arisen randomly within the parameters of current evolutionary theory.”
They then start asking questions, such as: *If the universe, or some aspect of it, is intelligently designed, how could we know it? Do reliable methods for detecting design exist? What are they? Are such methods employed in forensics, archeology, and data fraud analysis? Could they conceivably detect design in biological systems? *They then try to answer these questions as scientists.
Dembski in particular has made good use of irreducible complexity and specified complexity to show that such structures, regardless of whether they are biological, mechanical, linguistic, et cetera, scream for a designer. What he does, in short, is set up a series of criteria that can reliably detect design in information systems of
any type. Since DNA is an information system, it is, in principle, sound that DNA could be tested with his “design filter.” Accordingly, when DNA is so tested, it demonstrates all of the characteristics of being a designed information system.
Note that Dembski is not simply saying, “Current evolutionary theory can’t explain this; therefore, there is a Creator.” Instead, what he is saying is this:
- Current evolutionary theory can’t explain the specified complexity of DNA.
- I have a testable model that can be used to demonstrate whether or not a particular thing has the qualities of a specifically complex information system (such as this sentence).
- According to my model, DNA is specifically complex.
- Since a specifically complex information system requires a designer, it follows that DNA, at least at its point of origin, required a designer.
- Who or what this designer is may be a question science cannot answer, but science is not the end all and be all method of discovering truth.
As happens too often on both sides of the creation vs. evolution debate, one group mischaracterizes what the other group is saying. Strawmen are terribly easy to knock down, after all.
– Mark L. Chance.