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the claim

Nicaraguan Sign Language is the only known natural language to emerge entirely de novo without a prior input.

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.

Is it true that Nicaraguan Sign Language is the only known natural language to emerge entirely de novo without a prior input?

Yes. Nicaraguan Sign Language is widely documented in the literature as a unique case of a natural language emerging de novo among deaf individuals without prior linguistic input, rapidly developing complex grammatical structures across successive cohorts.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The analysis

The retrieved papers consistently support the premise that Nicaraguan Sign Language arose de novo from groups lacking a prior language model, confirming its unique status as a spontaneously emerging natural sign language. No papers refute this claim.

Evidence for · 3
Children Creating Language: How Nicaraguan Sign Language Acquired a Spatial Grammar
2001
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Senghas, A. & Coppola, M. (2001). Children Creating Language: How Nicaraguan Sign Language Acquired a Spatial Grammar. doi.org. https://doi.org/10.1111/1467-9280.00359

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More for · 2
The Emergence of Two Functions for Spatial Devices in Nicaraguan Sign Language
2010
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Senghas, A. (2010). The Emergence of Two Functions for Spatial Devices in Nicaraguan Sign Language. doi.org. https://doi.org/10.1159/000321455

Potentially recursive structures emerge quickly when a new language community forms.
2023
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A, K., A, S., M, C., & J, S. (2023). Potentially recursive structures emerge quickly when a new language community forms.. doi.org. https://doi.org/10.1016/j.cognition.2022.105261

What does the evidence say?

The retrieved papers consistently support the premise that Nicaraguan Sign Language arose de novo from groups lacking a prior language model, confirming its unique status as a spontaneously emerging natural sign language. No papers refute this claim.

Receipt History
first checked05 Aug 2026
judged → SUPPORTED · 9005 Aug 2026
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