Synthesized answer
The provided passages do not contain information that directly answers the question about what questions remain unanswered in "The Higher Learning in America" by Thorstein Veblen. The passages only offer the title, author, and general categories of the book. Therefore, I cannot identify any unanswered questions based solely on the given text.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: The Higher Learning in America by Thorstein Veblen Categories: Education, Higher Pages: 304