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John_Fx t1_j8hv4av wrote

Reply to comment by terribleturbine in Light traveling through a medium that slows it. Does the same photon emerge? by TheGandPTurtle

look up the single electron theory where the universe consists of only one electron bouncing back and forth in time.

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tnaz t1_j8mc77f wrote

The single electron universe model fails once you introduce other particles - a muon can decay into an electron and neutrinos. You can't represent that if there's only one electron going back and forth in time.

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