Earlier quoted context omitted.
Because they're numbers represented in digital form. In inference, you're doing simple math with those numbers. So what's alive, the numbers? Maybe the silicon holding the numbers? What if we print them out? Does the book become conscious? Even if you're a materialist, surely you think there is a difference between a human brain and a brain on a lab table. You take a dead persons brain, run some current through it an…
What's the fundamental, inescapable difference between "numbers represented in digital form" and "jelly made of wet flesh crammed into an oversized monkey skull"? Why should one be more valid than the other?
This materialist world view is very dangerous and could lead to terrible things if you believe numbers in a computer and a human being are equivalent.