Interesting! Now I want to read this book.
Thanks man. Started reading GEB last Saturday and I could figure out the
"HE" and "HEADACHE" ones but did not realize that "HEADACHE" was also
the response to tha "ADAC" puzzle.
Cheers from Argentina,
Thank you for posting this! Just came here to say that there is a Reddit
community at https://www.reddit.com/r/GEB/
that hosts discussion of this book.