ID theory claims to be able to identify if something is designed. The OP is simply asking for a description of how it would work, in practice, on a rock.
I posted on this thread simply because I have a problem with the term "Intelligent Design". Whe I first heard the term I assumed it would be something that I would adhere to. The I find out it is really a termed coined to try and achieve a political end, and the term has been twisted into meaning somethig that is different than the one would logically assume.
My view is that evolution has the appearance of ID, and you would logically think that there is no reason for them to be mutually exclusive. It seems though that the political movement believes that ID argues against evolution and so once again a pefectly useful term is corrupted. (The same can be said for the term creationism. )