Synthesized answer
The provided passages do not contain information about what questions remain unanswered in "The Art of War."
The passages only offer the title of the work and its attribution to Sun Tzu, a military strategist from the Late Spring and Autumn Period [1]. There is no content within these passages that addresses specific unanswered questions within the text.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: The Art of War by 孙武, Sun Tzu Description: The Art of War is an ancient Chinese military treatise dating from the Late Spring and Autumn Period. The work, which is attributed to the ancient Chinese military strategist Sun Tzu