Difficult:
The reverse inclusion ideas of 8.6 confuse me. I almost have as handle on it, but I have little confidence in my current hunches. Also, I'm having trouble following the arguments for why gamma + delta and gamma * delta are in Q in section 8.3.
Reflective:
The most interesting thing I found in this was the tangential remark that all geometries can be thought of as a theory of relevant invariants mentioned at the beginning of section 8.5.
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