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Ilja
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Discussion split from: https://www.physicsforums.com/threads/motivation-for-the-introduction-of-spacetime.866669/>>
You have to give up realism as well as causality if you want to defend the spacetime. An interpretation where we are, unfortunately, unable to measure with clocks and rulers which events happen at the same time, but this "same time" nonetheless exists, and "spacetime" fundamentally splits into space and time, can be realistic as well as causal.
In fact, I cannot imagine a more serious challenge of whatever belief - if I would have to give up realism and causality to defend this belief.
Discussion split from: https://www.physicsforums.com/threads/motivation-for-the-introduction-of-spacetime.866669/>>
You think the violation of Bell's inequality is not a serious challenge?PeterDonis said:They are the reasons standardly given in relativity theory. Whether they are "satisfactory" depends on who you are trying to satisfy. But I'm not aware of any serious scientific challenges to them.
You have to give up realism as well as causality if you want to defend the spacetime. An interpretation where we are, unfortunately, unable to measure with clocks and rulers which events happen at the same time, but this "same time" nonetheless exists, and "spacetime" fundamentally splits into space and time, can be realistic as well as causal.
In fact, I cannot imagine a more serious challenge of whatever belief - if I would have to give up realism and causality to defend this belief.
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