What is the mechanism the designer used to design?
The Short Answer: Intelligent design theory can only detect that which is empirically detectable via the scientific method. Epistemological theory limits the explanatory scope of any scientific theory. It may (or may not) be possible to determine the exact mechanism the designer used to do the designing–it just depends on what is theoretically possible to empirically determine. But we don’t have to be able to answer these questions to know that the object in question was indeed designed.