Synthesized answer
The provided passages do not contain information about what questions remain unanswered in the book "Superintelligence: Paths, Dangers, Strategies."
The passages only offer a brief description of the book, mentioning its ambitious and original nature, its subject matter of extreme levels of machine intelligence and their potential to shape the future, and the dependency of humanity's fate on the goals of a superintelligence [1]. There is no mention of specific unanswered questions.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Superintelligence by Nick Bostrom Description: This profoundly ambitious and original book picks its way carefully through a vast tract of forbiddingly difficult intellectual terrain. Categories: Computers Pages: 353 Snippet: Extreme levels of machine intelligence - superintelligence - would potentially be in a position to shape the future. What happens to humanity, whether humanity would even survive, would then depend on the goals of the superintelligence.