Photons and determinism, part 2

[Surgenator]

From its definition. Are you going to explain why it stops being a quanta a light in its own rest frame?

Sure. For the reason you just described: light moves at "c" in all reference frames, but nothing moves in its own reference frame. We can respond to this in one of two ways: 1) a photon doesn't have a reference frame; 2) a photon, in its own reference frame, is not light as we normally think of it, but a different kind of thing.

There are other options like (3) relativity isn't valid in the rest frame of the photon.
1) Maybe valid since you cannot boost into the frame
2) This doesn't make any sense. Changing views shouldn't change the physics.

In v1.0 of this thread, I took the position that a photon wasn't a thing at all, but rather an idea about a relationship between things, and that the universe was therefore best viewed in idealistic terms. In this thread, I am accepting the broken math and considering the consequences of that acceptance: the bringing together in spacetime of one framework which is infinite or undefined with our own rest frame. It's not that much different than asking what happens inside a black hole, or what existed "before" the Big Bang singularity, I guess.

By all means speculate all you like. However, you shouldn't think the photon as something unique, there is another known massless boson named gluons. Their behavior is more complex than the photon. They also cannot exist without the aid of a pair of quarks. But there are theories of glueballs. In addition, there are other massive bosons like Z and W just to make things more complicated.