I don't have a great deal of understanding of what kind of things(?) the laws of physics are, or how human beings can even know that everything that exists in the universe is subject to them. I'm inclined to treat the idea of the universal applicability of the laws of physics more as a methodological and heuristic assumption than as metaphysical truth.
It's not an assumption. It's the fundamental premise of all science that the natural universe is a closed system, whose behavior can be predicted by theories derived logically from empirical observation of its past and present behavior. This is the foundation of the Scientific Method.
The scientific method is recursive, and this premise has been tested exhaustively, often with great hostility, for half a millennium. And no evidence has ever been discovered to falsify it.
Like all scientific theories, this has only been proven
true beyond a reasonable doubt, and the possibility always exists that evidence may be found in the future to refute it. This distinguishes scientific theories from mathematical theories, which are derived completely from
abstractions, so they are true even if they don't actually describe the behavior of the universe.
I'm even less sure how to understand the meaning of claims that nothing supernatural exists, or that nothing above or beyond nature exists, let alone understanding how human beings could ever know that those propositions are true. They look like metaphysical beliefs to me.
We don't claim that these things do not exist. But we do invoke the Rule of Laplace: Extraordinary assertions must be supported by extraordinary evidence before we are obliged to treat them with respect.
No one has ever come to the gates of the Academy with simply
ordinary evidence of supernatural phenomena, despite the fact that hundreds of milions of people are convinced that they are true.
It's really not looking good for the doubters of science. How can anyone possibly believe something that is not supported by even the most humble evidence, much less believe it staunchly for
centuries?
I think that the evidence is that we often believe things that we don't fully understand.
No. It just seems that way to people who don't have PhDs and 20 years of laboratory experience in physics, chemistry, biology, etc. The folks who derive the theories that comprise the canon of science really do
understand them.
Some of them are exceptionally good teachers who can explain them to us, but it's a long process that most of us just don't want to bother with. When I was sixteen I read an incredibly good book that explained the Theory of Relativity. It was 200 pages long and it took me almost a year to get through it! But I understood it.
But since I didn't use it every day, I quickly forgot all the intricacies. I couldn't remember it a mere two years later when it was covered in my university physics class--a whole lot faster. I certainly couldn't explain it today.
And conversely, we might understand many things that we don't believe. Historians of science understand the old geocentric cosmologies quite well, while no longer believing in their literal truth.
The geocentric model was a perfectly good tool for predicting the motions of the heavenly bodies--in an era when no one could see the moons of the other planets. But when Galileo built a telescope that could show the orbits of the moons of Jupiter, the theory had to be elaborated.
The same was true of Newton's Laws of Motion. They're still perfectly accurate today--for people who live at the bottom of a gravity well and will never travel more than one-millionth of the speed of light. But like Galileo, Einstein had instruments that Newton didn't have, and he was able to see "deeper" into the question.
Many scholars in religious studies and comparative religion have a great deal of understanding of religious philosophies that they don't personally believe in.
Unfortunately for the supernaturalists, the derivation of the scientific method did not merely
elaborate on their theories of the behavior of the universe. It completely
destroyed them.
Some of them haven't gotten the message yet.