Book =/= data.

Descriptions of the book mention only "insights" and "clear thinking", so I'm assuming that the author didn't exactly go out and present charts, graphs and reports from careful studies, experiments and analyses. If my assumption that the book is merely "good thinking" rather than actual experimental results and observations is wrong, then my model needs some updates.

I was trying to clarify and differentiate between "Some cool guy wrote a book, some LW user believes what it says" and "A researcher presented experimental results, explained the most logical cause and effect for these results, and a LW user affirms that this is not cherry-picked or biased". I hope that makes it a bit more clear why I asked that question.