I am always puzzled by philosophical talk of laws of nature. The terms “law”, “govern”, and so forth amount to an extended metaphor drawn from human affairs, and thoroughly unnatural ones at that. It is a recurrent philosophical mistake to suppose that the most fundamental thing about the universe can only be treated with philosophical precision through a human metaphor. Without “laws”, and the corresponding but evidently false idea that it is possible to break them, contemporary metaphysics would look quite different. If you ask a philosopher whether it is possible to walk through a wall, she will say “Yes”, because only the laws “prohibit” it – even though everyone knows you can’t walk through a wall.