In the process of communicating scientific facts to the public, rhetoric two plays clear roles. Jeanne Fahnestock refers to the first role as “changes in information,” when the writer has a clear idea of what the average individual’s understanding is in relation to the scientific facts they are presenting so they use relevant statistical evidence to support claims. The second role is referred to as the “genre shift” in which rhetoric operates in such a way that it can create scientific facts by understanding the publics needs and limitations and accommodating the scientific facts in a way that supports those needs and limitations.