As pointed out in Lai (2006), Chan masters use verbal irony, puns, and witty remarks in their verbal interactions with disciples. In addition to these humor categories, there are other types of Chan texts, which become the subject of this study: (1) those which are playful but not humorous, (2) texts which contain incongruity but do not evoke humorous effects, and (3) humorous texts that do not contain incongruity. Specifically, this paper explores Chan texts that contain rhyming, game playing, iconoclastic discourse, and play with presuppositions. Since a near-consensus among humor researchers is that verbal humor is derived from the element of incongruity in the text, this paper aims at finding out factors that lead to non-humor in incongruous texts and humor in texts which do not contain incongruity. It is found that humor can emerge in its simplest form – a mere negation of presupposition – so long as relevance exists. This provides evidence for Giora’s (1991) Relevance Requirement and Attardo’s (2000) Principle of Least Disruption.