A coin flip is truly random with a 50/50 chance.

the verdict

INSUFFICIENT LEANING

Recorded sources

5 sources for · 0 against

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

Is it true that a coin flip is truly random with a 50/50 chance?

Unclear. The retrieved items only treat coin flipping as a convenient model of a fair, 50-50 random bit in cryptography, statistics and random-number discussions; none directly examines whether a physical coin flip is truly random with equal probability.

Verdict: PARTIAL LEAN · 5 sources for, 0 against · Last checked 18 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 5

Random flip-flop

Get citation

Random flip-flop. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Random_flip-flop

See more details

More for · 4

Coin flipping from a cosmic source: On error correction of truly random bits

2005

Get citation

Mossel, E. & O'Donnell, R. (2005). Coin flipping from a cosmic source: On error correction of truly random bits. doi.org. https://doi.org/10.1002/rsa.20062

Defining an independent reference model for event detection skill scores

2025

Get citation

Defining an independent reference model for event detection skill scores. (2025). doi.org. https://doi.org/10.22541/essoar.174129298.81850235/v1

Quantum weak coin flipping with a single photon

2020

Get citation

Mathieu, B., Ulysse, C., & Iordanis, K. (2020). Quantum weak coin flipping with a single photon. inis.iaea.org. https://inis.iaea.org/records/v79y3-zcx16

Random number generation

Get citation

Random number generation. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Random_number_generation

Receipt History

held for human review18 Oct 2026

Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.

Check your own claim

Challenge the receipt

I have a source that contradicts this verdict I have a source that supports it No source: request a receipt review Requests are recorded for review. This does not start an automatic check or guarantee a response time.

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work