A subfield of linguistics developed in the late 1970s, pragmatics studies how people comprehend and produce a communicative act or speech act in a concrete speech situation which is usually a conversation (hence *conversation analysis). It distinguishes two intents or meanings in each utterance or communicative act of verbal communication. One is the informative intent or the sentence meaning, and the other the communicative intent or speaker meaning (Leech, 1983; Sperber and Wilson, 1986). The ability to comprehend and produce a communicative act is referred to as pragmatic competence (Kasper, 1997) which often includes one's knowledge about the social distance, social status between the speakers involved, the cultural knowledge such as politeness, and the linguistic knowledge explicit and implicit.