Page and figure references are from the English Penguin Books edition, unless
Dialogue II: Two-Part Invention
"The two sides of this Triangle..." (p. 43) is contradictory (meaningless?).
Is this significant? If so, in what way?
Is there any connection between the words written in capitals?
Chapter II: Meaning and Form in Mathematics
Hofstadter makes a difference between interpretations and meanings (of
formal systems): A meaning is a "meaningful" interpretation of the symols
of a formal system. When does an interpretation get "meaningful"? Is this
ever clearly defined?