I appreciate (most of) the comments and actually made already a few changes based on them to clarify a few things (and correct typos etc).
But I'm not going to reply to anything specific here and now. This is just section 2 (with 1 only being an introduction). Some of what has been discussed in comments goes far beyond what is in these sections. Once you've read section 6 you probably have a better understanding about what is covered and what isn't (and to some extend: why certain things are covered in the first place).
So, don't regard my silence as a sign of disinterest, it just means that many questions will automatically be answered later.
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