The consciousness continuum matters to "Is the Doomsday Argument for Real?" (p. 107). If humans went extinct around 2100, I would have placed about one-third the way along all possible people, a statistical argument (which I am not sure is correct). It also bears on the question as to whether there is a moral responsibility to future generations -- to people who don't yet exist, have not even been conceived. It could be viewed religiously as a duty to "God" or "Allah".
On p. 58, there is "Do men and women have different brains?" Women have more white matter (connective stuff) and men have more gray (chess thinking). But is the white matter ratio 6.5:1 or is it really 6.5% more (not 6.5 times) -- a typo?
And, still, another matter: a postman somewhere started a charity for a boy who just wanted books to read to be sent to him. So maybe books should still be a commodity.