Conventions in Poincaré's sense are freely chosen for convenience and carry no epistemic necessity, yet Einstein's simultaneity convention is constrained by the invariance of light speed.

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Reasons For

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Reason for

1.Light speed invariance is empirically universal across all inertial frames, making simultaneity conventions tied to it physically justified rather than arbitrary.
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2.Poincaré conventions (like metric choices) remain truly conventional because alternatives work equally well; Einstein's simultaneity does not permit such substitutes.
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3.Physical constraints that eliminate viable alternatives transform what would be a convention into a constrained choice, distinguishing Einstein's from Poincaré's case.
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Reasons Against

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Reason against

1.Light speed invariance itself rests on a conventional choice to adopt it as a fundamental postulate; it doesn't derive from deeper non-conventional premises.
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2.Einstein's simultaneity remains operationally conventional—it depends on choosing clock synchronization procedures, which are definable multiple ways consistently.
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3.Calling something 'constrained by invariance' conflates physical constraints with epistemic necessity; constraints can preserve multiple conventional frameworks simultaneously.
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Key Terms

Einstein's simultaneity convention(in philosophy of physics): Einstein's rule for deciding whether two distant events happen at the same time—a choice that affects how we measure time in physics.
Epistemic: "Epistemic" relates to knowledge—how we know things, what counts as knowledge, and whether we can trust what we believe to be true. It comes from the Greek word for knowledge and is used to describe questions about the reliability and validity of our beliefs and understanding. For example, "epistemic humility" means acknowledging the limits of what you can actually know for certain.
Invariance of light speed(in relativity theory): The principle that light always travels at the same speed (about 186,000 miles per second) no matter who measures it or how they're moving, which is a fundamental law Einstein discovered.
Necessity (epistemic necessity)(in philosophy of knowledge): Something that *must* be true based on logic or the nature of reality, not just something we happen to choose.
Poincaré(as the scientist whose work is being referenced): Henri Poincaré was a French mathematician and physicist (1854-1912) who discovered that tiny, unmeasurable changes in a system's starting conditions can lead to completely different outcomes—a key insight that helped create chaos theory.
constrained(in philosophy of free will and autonomy): Limited or restricted in your ability to make free choices; having your options or freedom reduced by forces beyond your control.
convention(Used to distinguish mere regularities from convention-governed regularities in the analysis of meaning.): A regularity that obtains because there is something akin to an agreement among a group of people to keep the regularity in place.

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Truth & Knowledge1 linked Philosophy of Language1 linked

Calling something 'constrained by invariance' conflates physical constraints wit...Einstein's simultaneity remains operationally conventional—it depends on choosin...

Details

Type: claim
Perspectives: 2 (1 for, 1 against)
Edits: 1 edit