“Think about it: you are the product of one sperm out of 700 billion in your father’s lifetime, bumping into one egg out of the million your mother was born with. And that same reproductive lottery had to come up right with all four of your grandparents, all eight of their parents, all sixteen of theirs, and so on, back through 7,000 generations of human beings, and through all your non-human ancestors going back 3.5 billion years. Looked at that way, there’s no way in hell you could possibly exist. I don’t believe in you.”