"The distinction between the mind-like action of designing and the hand-like action of actualizing is key. Conceptualization precedes actualization. Thus, detecting design is much more like detecting another mind than detecting busy hands. In fact, if you did not perceive the mind, the hands would not be detected as designing - they’d be detected as doing. Without making any serious and honest effort to detect the mind-like action of designing, a focus on the hand-like action of actualization will not signal design."
UPDATE 05-Jan-2009: The above link is no longer available.