Remember that effect where you read a newspaper and mostly trust what it says, at least until one of the stories is about a subject you have expertise in, and then you notice that it's completely full of errors? It makes it very difficult to trust the newspaper on any subject after that. I started Bostrom's book very skeptical of how well he would be handling the material, since it covers many different fields of expertise that he cannot hope to have mastered.

My personal field of expertise is BCI. I did my doctoral work in that field, 2006-2011. I endorse every word that Bostrom wrote on BCI in the book. And consequently, in the opposite of the newspaper effect, I dramatically raised my confidence that Bostrom has accurately characterized the subjects I'm more ignorant of.