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1. Plenty of academics write books. 2. Comparing a paper and a book for length is obviously unfair. Bostrom has also written papers: https://en.wikipedia.org/wiki/Nick_Bostrom#Journal_articles_... 3. "Concrete theory" is vague. Is it a stand-in for "I won't accept any argument by a philosopher, only physicists need apply"?

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I'm not intentionally trying to snub philosophy. With concrete theory, the point I was reaching for is that when you look to measure impact you probably want to point back to a compact articulation of an idea.

The book comparison was probably a cheap shot (on the other side of it, Einstein didn't need popular interest/approval for his ideas to matter; I think that is a positive).

I think as much as anything the comparison is worthless because we can look backwards at Einstein.

Sure, that's fair. I think Bostrom is no Einstein. But I maintain that he's no crank, either. There's a lot of space in the world for people who are neither.

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