If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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I think it's very useful to listen to be able to listen to someone with domain expertise telling you when you are wrong when you are a beginner.
But then I'm allowed to ask "why?", and if the answer is "because I say so", then I feel pretty confident to dismiss the expert.
But that's not even the stage I'm at. A book is not an interactive medium, so the act has gone like this:
I'm still searching for an answer...