Synthesized answer
The provided passages do not contain enough information to determine the central thesis of "Reflections on Things at Hand" [1]. The passages only offer the title, author, category, and page count of the book [1]. Therefore, the central thesis cannot be identified from the given text.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Reflections on Things at Hand by Zhu, Xi, Wing-tsit Chan Categories: Philosophy Pages: 441