In a world befuddled by the concept of ‘fake news’, where words like ‘post-truth’ are common parlance, it is essential that we consider exactly what we think we know, what we do not and how we come to acquire such knowledge. The analysis of truth should come from an unbiased perspective and be critical of the various shibboleths that we take to heart. Appearance and Inference aims to identify the nonsense in as many knowledge-related platitudes or false assumptions as possible in just over a hundred pages.