I hear you but I think that design can be seperate from a designer. I would say that it does not follow that one must specify the designer at all. One may find design and never find the designer. You may infer a thing or two about it, but the inferences may not be plenty.
In broad strokes, if you presume a designer, you imply at least a few things:
- the designer exists
- the designer is capable of formulating the design
- the designer is capable of implementing the design
When we start looking at specific instances where a designer is invoked, we can start looking at specific characteristics: for example, genetic manipulation of a population of organisms or creation of some new organ from scratch would imply certain abilities on the part of the designer.
IC is based on the idea that evolution is physically incapable of creating certain traits. It's eminently reasonable to ask whether ID's alternative explanation would be any more physically capable of creating them.
Take the famous (and discredited) example of "irreducible complexity" that was used for quite some time: the bacterial flagellum. Certain ID proponents claimed that evolution would be incapable of creating it. The fact that this has been disproven aside, how possible is the alternative? Are there any physical limitations that would prevent some intelligent designer to round up a population of bacteria, somehow affix a flagellum, modify their genetic code, and then send them on their way... all without leaving any trace of this activity that can be detected by us? My gut feeling is that there probably are.
Right. But with my analogy I was thinking more along the lines that the explanation and observation of evolution does not require the explanation and observation of abiogenesis. Which is also what I'm saying about design and designers. (assuming they ever get a proper test for design, oops, there's that speedbump again).
But the thing is this: they can't. Ever.
At least in terms of irreducible complexity, the claim used is that some phenomenon could not have happened by any natural means that we know of. However, even if this were true, it would still allow several alternate explanations:
- the phenomenon was the deliberate action of an intelligent supernatural entity (i.e. ID).
- the phenomenon was the non-deliberate action of some not-necessarily-intelligent supernatural entity.
- the phenomenon happened by natural means that are, so far, unknown to us.
The only valid justification I can see for deeming some natural feature to be designed would be a sworn affadavit from God Himself to this affect, preferably accompanied by video footage of Him doing the design and creation.