Synthesized answer
The provided passages do not explicitly state the central thesis of "The Principles of Linguistic Philosophy." [Passage 1] offers the title and author of the book, as well as its categorization as "Analysis (Philosophy)" and its page count. However, it does not offer any content that would reveal the main argument or central idea of the text.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: The Principles of Linguistic Philosophy by Friedrich Waismann Categories: Analysis (Philosophy). Pages: 444