Standard is one of the book Q&A Learning Modes.
The general mode that answers questions from the whole book and its knowledge graph. It loads chapter summaries and graph stats, gives accurate chapter-cited answers in clear Markdown, and admits when a question falls outside the book. The most common entry mode for everyday lookup and open Q&A.
> Example: Pick "Standard", then ask — "What are the main causes of the Jia family's decline? Please cite the relevant chapters."