You are universalizing the particular, a logical fallacy. The best you can say is you've never seen them change. To assert they never change is an article of the naturalistic faith.
The best I can say is that all of the evidence supports my claim. Your theory is possible and I can't prove it flase, but there is no evidence to support your position, other than your personal belief.
An interesting observation. Naturalists do assume that natural laws nev3r change, but they most definitely don't believe they never change. In fact the day to day practice of science continually puts this assumption to the test.
That is the fundamental difference between science and religion. Nature continously challenges us to put it to the test. Religion commands us not to put it to the test.
This is the clearest and cleanest distinction that can be made, whether a belief system can be put to the test.