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Einstein says information cannot be transmitted faster than light. Say I set an alarm that ring at 9:00 am. I go to school, and wait until 9:00 am. Then I tell my friends that my alarm rang. If the distance of the alarm clock and school is sufficently large, I think I can say the information that alarm rang is transmitted faster than the light. Why is this wrong? + If information means number of yes/no questions you need to get answered to fully specify the system, how do that 'move'?

tneserp
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    It is wrong because no information is actually transmitted. Having a thought about your clock is not the same as receiving information from your clock. – joseph h Jan 07 '24 at 02:19
  • What is information transmission? – tneserp Jan 07 '24 at 02:25
  • It's literally in the title and body of your question. It means the movement/transfer of information from one point to another. Are you asking what information is? – joseph h Jan 07 '24 at 02:41
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    Does this answer your question? What is information? – Dale Jan 07 '24 at 02:46
  • If information is 'number of yes/no questions you need to get answered to fully specify the system', how does that 'move'? – tneserp Jan 07 '24 at 02:59
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    The thing is, you don't in fact know the alarm went off. Maybe someone else turned it off, or maybe it malfunctioned. All you've transmitted to your friends is your own personal guess as to the state of the distant alarm. – Eric Smith Jan 07 '24 at 09:50
  • Say I made sure that the alarm doesn't go off. If the universe is deterministic, it is possible to control future state by setting the proper present state – tneserp Jan 08 '24 at 03:04

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