In the field of rhetoric, genre theorists usually understand genres as types of actions rather than types or forms of texts. On this perspective, texts are channels through which genres are enacted. Carolyn Miller's work has been especially important for this perspective. Drawing on Lloyd Bitzer's concept of rhetorical situation, Miller reasons that recurring rhetorical problems tend to elicit recurring responses; drawing on Alfred Schütz, she reasons that these recurring responses become "typified" – that is, socially constructed as recognizable types. Miller argues that these "typified rhetorical actions" (p. 151) are properly understood as genres.