God on a Microscope Slide?

Dana over at Delaware Watch gets to the heart of the matter of intelligent design in terms of what is and what is not knowable:

Of course, the damning reason against treating ID as a viable scientific theory is that whereas the “gaps” in evolutionary theory are in principle potentially discoverable by scientific means, discovering the Intelligent Designer is not. Besides, do spiritual persons really want to suggest that their Intelligent Designer could be discovered slithering on a slide beneath a microscope?