"So the 'cause' of the decay is not internal to the muon. But there is also nothing *outside* interacting, so there is no cause outside either."<quoted text>
I agree. But there are many things about quantum mechanics that differ from classical mechanics and one of them is the lack of causes. Since quantum mechanics *does* agree with *all* available evidence, we should give some credence to its conclusions. Among these conclusions are that objects do not have well defined properties outside of observation and that the classical notion of causality does not apply to quantum events.
Now,*you* are, once again, the one claiming that we cannot draw conclusions based on the observations we have done. Among the conclusions is the simple fact that a muon just before a decay is *exactly* the same as a muon at any other time. So the 'cause' of the decay is not internal to the muon. But there is also nothing *outside* interacting, so there is no cause outside either.
Please be more detailed here. Which elements do you think it is affected by?
One the contrary, we *can* prove the earth is not flat via observation. Muons have been studies for the last 50+ years and their properties are quite well known.
You may suggest it, but you are wrong. I often wish the universe were more deterministic and had more causality than it does. but the actual evidence is that classical notions of causality are simply wrong. And yes, the tests actually do test *all* possible causal theories.
Prove that last phrase.
There is no difference between a bubble at the bottom of the ocean being affected by water pressure and a muon anywhere in the universe. All in the same container. Buoyancy is universal if gravity is. More accurately, is the forces and relationships in all directions that causes buoyancy.