I have one typo correction and a couple of stupid questions I'm sure someone already thought about within the last number of years.
Typo: The last number in the equation should be 1229 instead of 1226.
1. What is the ying-yang looking block in the left antenna of the picture at the bottom of page 57? It looks like part of a keyboard with the black and white keys. It is not visible in the similar pictures on pages 24, 25, and 26. It also doesn't show up on the "enhanced" version with the stars.
2. Why does the "dead guy" on page 22 seem to have a cavity in the abdominal area where people have no bones?
I'm brand new to this site and the Cicada 3301 puzzle. Please, don't expect a riveting back and forth conversation on this topic.