This frustrating vagueness and signature indecision in the text leaves interpreters to philosophize about what Zhuangzi’s implicit answer (明 míngdiscern:clear) might be. However, the analogy with bird calls is a fortuitous suggestion. We arrange, adapt and modulate the elements of our language to fit our environment, abilities, and opportunities (e.g., mating). Would Zhuangzi have guessed the same about birds?