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So if you can't avoid collisions, your information is getting permanently messed up. And if you could, you could just shift it the other way and get the message. But you can't. Kind of sad when you think about it.
Yeah, reversing EVERYTHING in theory. Is there a point where the information becomes unrecoverable, similar to how the double-slit experiment changes the state permanently? Is the state of my information changed when it becomes part of the noise permanently, and I can never see it again even if I reversed time?
The question is; can you theoretically pull all of the information out of the background radiation in reverse to find their origins. You're saying yes. What I'm saying is that all of that information eventually becomes garbled as it propagates further. That clashes with you saying you can pick out the sources. -- Why is a particular wave, "hello" for instance, not slowly stretched and broken as it propagates through space. -- Why do you say we can pull it back out?
Not with vibrations, but with the movement of the electrons when an alternating electric field is applied to them. Then wouldn't the entire object 'apple' have a system that resonated at a certain frequency and resulted in stabilized waves if you were to look at each individual atom? Basically, I can make an apple a electric resonantor, just not a 'sonic' resonator.
Anything coherent carrying information. Hawking radiation propagates away from a black hole and into cosmic background radiation, that's not one source.
Cosmic background radiation is a collection of signals though. Once a signal 'becomes' part of it, its information is permanently lost. So how is it a signal? It's just noise, right? You cannot pick out the first SETI broadcasts (or whatever signal you want) from it.