Frogs do not sleep, because they never enter a sleep-like resting state.

the verdict

REFUTED

the evidence says no

Recorded sources

0 sources for · 1 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 frogs do not sleep, because they never enter a sleep-like resting state?

No. One review of animal sleep discusses the bullfrog case directly: the single 1967 study concluding bullfrogs do not sleep is criticized as methodologically weak, and the review states more experiments are needed before concluding bullfrogs do not sleep. No retrieved item supports the claim that frogs never enter a sleep-like resting state.

Verdict: REFUTED · 0 sources for, 1 against · Last checked 3 Oct 2026

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

Evidence against · 1

Is Sleep Essential? -

Get citation

Is Sleep Essential? - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1371/journal.pbio.0060216

Receipt History

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