 This passage reinforces the conclusion that norms of correct word use is Zhuangzi’s core skeptical target. So we may indeed know how to act, according to some norms of using ‘know how’ and not if judged by some other dào of correct usage of the knowing/ignorant distinction. Linguistic skepticism easily metastasizes to virtually any commitment. According to which dào of projecting past practice should we judge this linguistic behavior as conforming to our commitment or not. Normative skepticism, in a use-theory is hard to contain—especially when the model of all judgments is as some indexed 是 非 shì-fēithis-not that assignment. It sweeps in metaphysics, epistemics, and semantics.