rationalskepticism.org

I would add that, in order to support the claim that "design" can be determined from the inherent qualities of the object itself, they would have to demonstrate that the "designed" rock can be identified without reference to another artifacts of similar appearance. So if they say, "This rock, because it resembles other examples of arrowheads (or whatever) with which we are familiar." then they fail the test. They would have to say something like "This rock, unlike the others, is irreducibly complex, or contains specified complex information."

It'll be interesting to see what answers we get.