Start from what's broken

The index is sorted by the question you are answering. Most people do not arrive with a question. They arrive with a symptom. Here are the eleven most common ones. Each is mapped to the tools that bear on it, wherever those tools sit.

Each set mixes strong and weak evidence on purpose. A Folklore tool in the list is not a mistake. It is usually the first thing somebody will hand you, and knowing what it cannot tell you is the point.