There are no definitive lists of genres, discourses, or any of the other categories I have distinguished for analysts to refer to, and no automatic procedures for deciding what genres etc. are operative in a given text. Intertextual analysis is an interpretive art which depends upon the analyst's judgement and experience. Of course, the analyst does have the evidence of language, and the most satisfactory intertextual analyses are those where the identification of genres, discourses and other categories in a text is supported by features of and distinctions within the language of the text. The labelling of intertextual categories may, moreover, be at varying levels of specificity. Different analysts might, for instance, depending upon their purpose and focus, identify the same text generically as interview, media interview, news interview, aggressive type of news interview, and so forth. (Fairclough, 1995; p. 77)