In the public understanding of science, rhetoric has two distinct roles: it is both a theory capable of analysing public understanding and an activity capable of creating it. In its analytical role, rhetoric reveals two dominant models of public understanding: the deficit model and the contextual model. In the deficit model, rhetoric acts in the minor role of creating public understanding by accommodating the facts and methods of science to public needs and limitations. In the contextual model, rhetoric and rhetorical analysis play major roles. Rhetorical analysis provides an independent source of evidence to secure social scientific claims; in addition, it supplies the grounds for a rhetoric of reconstruction, one that reconstitutes the fact and facts of science in the public interest.
