This chapter introduces significant themes in the scholarly study of misinformation, particularly concerning disagreement about its importance to modern life. Key concepts often used to discuss the problem of misinformation, are introduced, including: hoaxing, gossip, propaganda, persuasion, fake news, post-truth, bullshit, misinformation and disinformation. The origins and the analytical merits of each of these concepts are explored, comparatively. In the process, it becomes apparent that some people fundamentally disagree about the very definition of the problem, but also that political disagreement is not the only challenge towards better understanding misinformation and contingent concepts. A novel approach to analysing misinformation is introduced, the TATI multilevel discourse method of analysis. An overview of this method’s application and utility within the field is set out; and four ways of thinking about misinformation; as theory, as aesthetic, as tool and as ideology, are introduced. The author’s research positionality is set out, and an overview of the ‘tools’ (or heuristics) of the granular approach to discourse analysis undertaken in this book, are set out.