Elephants all the way down

Will Wilkinson writes,

[T]ry this. ID, even if true, puts us in an explanatory spiral, an unclosed regressive loop.

Assume ID is the best explanation for ordered complexity. That means, our best theory of ordered complexity posits the existence of an intelligent designer, meaning that we posited intelligence as an explanatory fundamental. However, intelligence as we know it is a property of biological beings, and a form of the kind of ordered complexity we initially sought to explain.

If it is suggested that "higher" intelligence is not a form of ordered complexity analogous to our own intelligence, then there is no ground for calling it intelligence after all. If it is itself a form of ordered complexity, then we have made no explanatory advance, for we will be left positing an even higher order intelligent designer for each higher order intelligent designer.

If it proposed that we stop the explanatory spiral by positing an undesigned designer then a new question arises: What explains the emergence of the undesigned designer? Whatever the explanation for the ordered complexity of the undesigned designer may be, then it seems that that explanation could be applied to first order ordered complexity, and Occam demands we excise the useless proliferation of higher order designers.

If it is replied that there is no mechanism that gave rise to the undesigned designer, then first order ordered complexity is still unexplained, only it is now more elaborately unexplained.

I don't think that's going to convince those who believe in "intelligent design". They've only got one designer in mind, and for them looking into his origins is irrelevant, because it's not in their book. Or would they say it's turtles all the way down? (I'm not the first to think of this.)

Will Wilkinson also links to DANIEL C. DENNETT's Show Me the Science, in which he states

...no intelligent design hypothesis has even been ventured as a rival explanation of any biological phenomenon. This might seem surprising to people who think that intelligent design competes directly with the hypothesis of non-intelligent design by natural selection. But saying, as intelligent design proponents do, "You haven't explained everything yet," is not a competing hypothesis. Evolutionary biology certainly hasn't explained everything that perplexes biologists. But intelligent design hasn't yet tried to explain anything.

To formulate a competing hypothesis, you have to get down in the trenches and offer details that have testable implications. So far, intelligent design proponents have conveniently sidestepped that requirement, claiming that they have no specifics in mind about who or what the intelligent designer might be.

And he comes up with one.

To see this shortcoming in relief, consider an imaginary hypothesis of intelligent design that could explain the emergence of human beings on this planet:

About six million years ago, intelligent genetic engineers from another galaxy visited Earth and decided that it would be a more interesting planet if there was a language-using, religion-forming species on it, so they sequestered some primates and genetically re-engineered them to give them the language instinct, and enlarged frontal lobes for planning and reflection. It worked.

If some version of this hypothesis were true, it could explain how and why human beings differ from their nearest relatives, and it would disconfirm the competing evolutionary hypotheses that are being pursued.

We'd still have the problem of how these intelligent genetic engineers came to exist on their home planet, but we can safely ignore that complication for the time being, since there is not the slightest shred of evidence in favor of this hypothesis.

But here is something the intelligent design community is reluctant to discuss: no other intelligent-design hypothesis has anything more going for it. In fact, my farfetched hypothesis has the advantage of being testable in principle: we could compare the human and chimpanzee genomes, looking for unmistakable signs of tampering by these genetic engineers from another galaxy. Finding some sort of user's manual neatly embedded in the apparently functionless "junk DNA" that makes up most of the human genome would be a Nobel Prize-winning coup for the intelligent design gang, but if they are looking at all, they haven't come up with anything to report.

The key word is "testable".