Synthesized answer
The provided passages do not contain enough information to explain the key concepts in my own words. The passages only provide the title of a discussion between Niels Bohr and Albert Einstein, along with the page number [40]. There is no content from the discussion itself that would allow for an explanation of key concepts.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: Discussion with Einstein on Epistemological Problems in Atomic Physics by Niels Bohr, Albert Einstein Pages: 40