“But, don’t you see,” said I, “that science never could show anything of the sort?”
“Why on earth not?”
“Because science studies Nature. And the question is whether anything besides Nature exists—anything ‘outside.’ How could you find that out by studying simply Nature?”
--C. S. Lewis
Natural laws only tell you what will happen as long as there is no interference in the system from the outside. Furthermore, those laws can’t tell you if such interference is going to occur.