The relation between knowledge and action has been a lengthy debate in philosophy which traces back to Descartes and Locke. Purism holds that the practical factors related to action are fundamentally independent of the standard of knowledge, while pragmatic encroachment argues that practical considerations about action can impact judgments about knowledge. This traditional debate was put front and center recently by discussions on some knowledge attribution cases and relevant empirical studies. This paper reports three empirical studies based on three pairs (...) of classic knowledge attribution cases on Chinese participants. The results indicate that folk's understanding of knowledge is more compatible with purism and suggest a conversational implicature account of the connection between judgments about knowledge and action. (shrink)