Synthesized answer
The provided passages do not contain information about what questions remain unanswered in "LaTeX: A Document Preparation System." The passages only offer a title, author, description, categories, and page count for the book [1].
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: LATEX by Leslie Lamport Description: Computing Methodologies -- Text Processing. Categories: Computers Pages: 298 Snippet: Computing Methodologies -- Text Processing.