"In the abstract, it might be tempting to imagine that irreducible complexity simply requires multiple simultaneous mutations - that evolution might be far chancier than we thought, but still possible. Such an appeal to brute luck can never be refuted... Luck is metaphysical speculation; scientific explanations invoke causes."

Previous Quote

What makes you a real girl or boy is that no one laughs at you. If you are imitation or unreal, the rules give you a right to exist provided you do what the real ones or brutes say. What makes you into me or Charles Morgan is that the rules allow all the girls to be better than me and all the boys better than Charles Morgan.

— Diana Wynne Jones