Sometimes you will hear things about light being the absolute limit at which information can be transmitted., and causality. The speed of light has nothing at all to do with causality. From such nonsense comes the pseudo-science people call "Quantum Mechanics". Travelling faster than another beings relative speed of light won't make you see events before they happen. There is no speed of information; period. None. Of any sort, whatsoever. There is only speed of perceiving events.
While we're at it, people like to misunderstand Heisenberg's uncertainty principle as well. Light particles knock around subatomic particles, all he was saying is that it's impossible to observe CERTAIN events without disrupting the "no light" version of the outcome. It means that, as of right now, we are uncertain about how certain particles behave because we have no non-obstrusive way to observe them yet.
Some scientists like to read that as "observation changes outcome" and start extrapolating nonsense from it. Schroedinger's Cat is actually an exercise to demonstrate how absurd this line of thought is, not to provide layman's proof of "transfer of information" or "alternate probability outcomes".
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