Which of these is one of Halliday's seven functions?

1. Halliday's seven functions are instrumental, regulatory, interactional, personal, heuristic, imaginative and representational. 2. Heuristic is language used to gain knowledge about the environment. 3. Phatic, emotive and conative belong to Roman Jakobson's list of six. 4. Jakobson's list also has referential, poetic and metalingual functions. 5. Halliday's list is about how children use language, while Jakobson's is about acts of communication. 6. So the only Halliday function among the choices is heuristic. **Why the other options fail:** - Phatic belongs to Jakobson and covers social contact. - Emotive also belongs to Jakobson and covers the speaker's feelings. - Conative belongs to Jakobson and covers directing the listener. _Source: Wikipedia, "Michael Halliday", section "Studies in child language development" (revision 1371974860)_