Abstract

Argumentation or reasoning is the act of rendering theses rationally justified or plausible, through appeal to specific premises and the use of logical inferences. The principal forms of logical inference are deductive, inductive, and abductive. The chapter outlines some common argumentative fallacies and discusses important modes of argumentation, such as the use of universalizing arguments, wedge arguments, arguments from authority, and arguments from analogy, arguing through thought experiments and allegories. In the light of the modern global turn, the focus of research in the theory of reasoning and argumentation has shifted to the examination of how fundamental theses can be justified, as well as questions about how to engage in argumentation with people whose worldviews differ markedly from our own. Yet reasoning as a method of rational conviction still plays a decisive role in the comprehension, clarification, and critical questioning of one’s own positions, as well as that of others.