 There are a number of phrase regimens: knowing, describing, recounting, questioning, showing, ordering. etc. Phrases from heterogeneous regimens cannot be translated from one into the other. They can be linked one onto the other in accordance with an end fixed by the a genre of discourse …Genres of discourse supply rules for linking together heterogeneous phrases, rules that are proper for attaining certain goals: to know, to teach, to be just, to seduce, to justify, to evaluate, to rouse emotion, to oversee. (Differend, xii).