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the claim

Diamonds form from carbon and fall as rain inside Neptune.

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 diamonds form from carbon and fall as rain inside Neptune?

Unclear. Several sources indicate that diamonds can form from methane-derived carbon under Neptune-like pressures and may rain downward inside Neptune, but the findings are hedged, laboratory-based, or modeled rather than directly observed.

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

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

Evidence for · 5
Neptune
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Neptune. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Neptune

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More for · 4
Extraterrestrial diamonds - Wikipedia
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Extraterrestrial diamonds - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Extraterrestrial_diamonds

Diamonds Really Do Rain on Neptune, Experiments Conclude
2017
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Cartier, K. (2017). Diamonds Really Do Rain on Neptune, Experiments Conclude. doi.org. https://doi.org/10.1029/2017eo082223

Gravity Assist: It’s Raining Diamonds on These Planets - NASA
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Gravity Assist: It’s Raining Diamonds on These Planets - NASA. (n.d.). nasa.gov. https://www.nasa.gov/podcasts/gravity-assist/gravity-assist-its-raining-diamonds-on-these-planets/

Thermodynamics of diamond formation from hydrocarbon mixtures in planets
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Thermodynamics of diamond formation from hydrocarbon mixtures in planets. (n.d.). cir.nii.ac.jp. https://doi.org/10.1038/s41467-023-36841-1

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