Faster than light travel violates causality by enabling retrocausality or time travel paradoxes

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Established physics and philosophical analyses consistently indicate that faster-than-light travel permits backward causation, thereby violating standard causality and generating time travel paradoxes.

The analysis

The claim connects faster-than-light travel with violations of causality and time travel paradoxes. Papers [1], [4], and [9] directly discuss how superluminal motion or backward causation leads to classic time travel paradoxes and challenges to causality. No papers refute this connection within standard physical theory; hence, the verdict is SUPPORTED.

Evidence for · 3

Paradoxes of Time Travel

Recorded source metadata

Ryan Wasserman. Paradoxes of Time Travel. 2018. https://doi.org/10.1093/oso/9780198793335.001.0001

This work details how causal paradoxes, backward causation, and time travel issues naturally emerge when considering temporal violations and related physical concepts.

Source citation format

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More for · 2

Lectures on faster-than-light travel and time travel

Recorded source metadata

Barak Shoshany. Lectures on faster-than-light travel and time travel. 2019. https://doi.org/10.21468/SciPostPhysLectNotes.10

These lecture notes comprehensively analyze superluminal travel and spacetime geometries, detailing the associated time travel paradoxes and their proposed resolutions.

Source citation format

Oliver Heaviside: an accidental time traveller

Recorded source metadata

P. Nahin. Oliver Heaviside: an accidental time traveller. 2018. https://doi.org/10.1098/rsta.2017.0448

This historical and physical paper discusses faster-than-light charged particles and the classic time travel paradoxes associated with sending information into the past.

Source citation format

The paper trail · every fact has a biography

first checked02 Aug 2026

judged → SUPPORTED · 8602 Aug 2026

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