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In what city do the two people F and F' say breakfast
occured in? According to SR (special relativity) in your opinion?
F says that breakfast occurred in Los Angeles. F', in order to get a
distance of zero between breakfast and lunch (which is what
SR gives for this case), must say that breakfast and lunch both occurred
at the same place. But he must necessarily determine that zero distance
at the time of lunch, when he is in San Diego. So he says that, since
there is zero distance between breakfast and lunch, and lunch occurred
in San Diego, breakfast must have occurred in San Diego (assume that he
had a blindfold on until he arrived at lunch and was driven by a
chauffeur).
Let me pose a slightly different question. Its 10am according to F' several
hours after breakfast and several hours before lunch according to F'
In what city does F' say his breakfast occured?