Physics permits models with a variable speed of light and absolute time.

the verdict

SUPPORTED

the evidence backs this

Recorded sources

2 sources for · 0 against

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Is it true that physics permits models with a variable speed of light and absolute time?

Yes. Physics literature includes alternative frameworks, such as preferred-frame theories of gravitation without Lorentz invariance, that permit absolute time and distinguish themselves from special relativity.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked 5 Aug 2026

The analysis

Judged against the evidence record for claims of this kind.

Evidence for · 2

Phenomenology of theories of gravity without Lorentz invariance: The preferred frame case

2014

Identifies theories of gravitation without Lorentz invariance possessing a preferred time direction.

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Blas, D. & Lim, E. (2014). Phenomenology of theories of gravity without Lorentz invariance: The preferred frame case. peer-reviewed literature. https://doi.org/10.1142/s0218271814430093

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More for · 1

Thought experiment discriminating special relativity from preferred frame theories

2018

Discusses absolute synchronization and theories distinguishable from special relativity.

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Spavieri, G., Rodriguez, M., & Sánchez, A. (2018). Thought experiment discriminating special relativity from preferred frame theories. peer-reviewed literature. https://doi.org/10.1088/2399-6528/aad5fa

Related receipts

Is it true that gravity travels at the speed of light? SUPPORTED related question, same topic
Is it true that gravity propagates at the speed of light? SUPPORTED related question, same topic

What does the evidence say?

Judged against the evidence record for claims of this kind.

Receipt History

first checked05 Aug 2026

judged → SUPPORTED · 7505 Aug 2026

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