When stating something as a fact on HN the poster typically posts proof that is verifiable. When you post a link to a book there is no research one can verify.

When stating something as a fact on HN the poster typically posts proof that is verifiable. When you post a link to a book there is no research one can verify. It's of no value in the timespan nor do posters have the trust that they should pay money to see evidence that someone purports. In addition to that you'd still need to verify the source(s) that book used, if it even cites any (I'm unfamiliar with the book, how would I know what it contains?). Essentially: You're wrong but you have to pay and wait a few days to know why. Not really in the spirit of constructive arguments on HN. In my opinion, anyway.