In order to determine whether two participants in a discussion are in real dis/agreement, one must compare their propositions. Comparison presupposes yardsticks in common. <strong>Analysis of Dis/agreement</strong> thematises such yardsticks, in that it demonstrates the existence, content and factual significance of a relatively well-delimited set of proposition types and proposition patterns, with their accompanying tenability criteria and motivating interests. The book is a work in the field of <em>legal theory</em> by virtue of its demonstrating how lawyers power of judgement is constituted in and through these yardsticks. The book is <em>interdisciplinary</em> by virtue of its demonstrating how the same yardsticks come into play more generally in argumentation formulated in everyday language, i.e. independently of law. And the book is a work in the field of <em>philosophy</em> by virtue of its demonstrating the existence and factual significance of language and argumentation actions with a certain independence in relation to the level of controversial fundamental philosophical positions.