Rhetoric and logic used together is also the basis for finding the methods by which science and inquiry are conducted. The use of rhetoric in laboratory practices is important. For scientists need to have good reasons for their actions. This upper level logic is filled with abstract ideas, and every step is in need of good support for making that step. This support is needed for the argumentation that occurs among mathematicians about the validity of each step of the proof.
Rhetoric is used very much in science when analyzing evidence and theories.
At this point in time there is no indisputable proof of the theory of evolution. So rhetoric and the facts that we do have must be used until proof may be found. Darwin kept notes throughout his discovery of the theory of evolution. When current scientists look at his notes it seems that form one step in the theory to the next there is not a strict logic being followed. The use of rheotric in inquiry is easier to discern, because it follows a dialogue type interaction.