Synthesized answer
The central thesis of "Words and Rules" by Steven Pinker and Arthur Morey explores how language functions and how humans acquire it [1]. The book delves into the reasons behind language evolution and the presence of numerous peculiarities and inconsistencies within languages [1].
The provided passages indicate that the book investigates the "profound mysteries of language" [1]. However, the specific central thesis, which would articulate the main argument or overarching claim of the book, is not explicitly stated within these passages. The passages describe the topics the book covers, such as language acquisition, change, and irregularities, but do not present the core argument that ties these topics together into a central thesis.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Words and rules by Steven Pinker, Arthur Morey Description: How does language work, and how do we learn to speak? Why do languages change over time, and why do they have so many quirks and irregularities? In this book, the profound mysteries of language are explored.