Valentine: There was someone, forget his name, 1820s, who pointed out that from Newton's laws you could predict everything to come -- I mean, you'd need a computer as big as the universe but the formula would exist.
Chloe: But it doesn't work, does it?
Valentine: No. It turns out the maths is different.
Chloe: No, it's all because of sex.
Chloe: That's what I think. The universe is deterministic all right, just like Newton said, I mean it's trying to be, but the only thing going wrong is people fancying people who aren't supposed to be in that part of the plan.
Valentine: Ah. The attraction that Newton left out. All the way back to the apple in the garden.