Synthesized answer
The provided passages do not contain information about what questions remain unanswered in "Between Facts and Norms." The passages describe the book as Habermas's work on law, democracy, and the modern constitutional state, where he develops his own account of the nature of law and democracy [Passage 1].
Therefore, the passages do not offer any details regarding specific unanswered questions within the book.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Between Facts and Norms by Jürgen Habermas Description: This is Habermas's long awaited work on law, democracy and the modern constitutional state in which he develops his own account of the nature of law and democracy. Categories: Philosophy Pages: 637 Snippet: This is Habermas's long awaited work on law, democracy and the modern constitutional state in which he develops his own account of the nature of law and democracy.