Second, and more importantly, this sentence stands out:
Hence it is through reference to our own activity, conscious and projective, intentional and purposive-it is as makers of artifacts-that we judge of a given object's "naturalness" or "artificialness."
Maybe it is simply not possible to make such judgments without accessing this subjective element. After all, recognizing design may indeed be akin to recognizing another mind. For how do we recognize other minds if not by recognizing what they design?
*BTW, the quote is from the first three paragraphs of chapter 1.