Technical rebuttal: semantic density and the “Naibbe” verbosity constraint

Q: What does this research mean for the field?

The 'Naibbe cipher' framework proposed by Greshko (2025) faces technical limitations regarding semantic density and verbosity constraints when generating Voynich Manuscript-like text. Novelty: ClaimNovelty.CONTRADICTORY. Consensus alignment: ConsensusAlignment.CHALLENGES_CONSENSUS.

Domingo Delgado

doi:10.1080/01611194.2026.2716121

September 7, 2026Cryptologia

Technical rebuttal: semantic density and the “Naibbe” verbosity constraint

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Key Points

To evaluate the semantic density and verbosity constraints inherent to the Naibbe cipher model proposed for generating Voynich Manuscript text.
Analyzed the theoretical mechanics and text-expansion properties of the Naibbe cipher framework proposed by Greshko (2025).
Assessed ciphertext expansion rates, semantic density limits, and verbosity trade-offs relative to the known statistical properties of the Voynich Manuscript.
Identified significant structural verbosity constraints within the Naibbe cipher framework that require excessive character expansion to encode plain text.
Demonstrated that low semantic density in the generated ciphertext undermines the cipher's viability as a plausible historical method for the Voynich Manuscript.

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Implication

Technical evaluation reveals verbosity and semantic density constraints in the Naibbe cipher model, suggesting limitations in explaining Voynich Manuscript text.

Abstract

To the Editors of Cryptologia,Recent scholarship on the “Naibbe cipher,” proposed by Michael A. Greshko (2025), offers a valuable proof-of-concept framework for generating Voynich Manuscript-like c...

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Domingo Delgado (2026) studied this question.

synapsesocial.com/papers/6aa27b2658559d80afc743ce https://doi.org/10.1080/01611194.2026.2716121

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Technical rebuttal: semantic density and the “Naibbe” verbosity constraint

Key Points

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Implication

Abstract

Discussion

Cite This Study

Technical rebuttal: semantic density and the “Naibbe” verbosity constraint

Key Points

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Implication

Abstract

Discussion

Cite This Study

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