The idea that there are three types of argumentation, deduction, induction, and a third type variously called hypothesis, abduction, or retroduction, first appeared in an 1867 paper by Charles S. Peirce, “On the Natural Classification of Arguments”. According to Peirce’s tripartite division of argumentation, induction is not merely any form of argument that fails to be deductive, but argumentation that generalizes from a sample. In later writings Peirce broadened his notion to mean any testing of hypotheses through observation—as Peirce said, (...) “trying how things will act”. If we understand an observation to be a sample of experience, as Peirce did in 1901 (R L 409:3... (shrink)