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Answer · Voynich Manuscript

A known language under a homophonic cipher

The text is a known language under a homophonic/verbose cipher (several ciphertext units per plaintext letter), units being glyphs, slot-fillers, BPE tokens or whole words.

Ruled outAnswers 1 questionDeductiveTested0

Where it stands

Ruled outNone pieces of evidence for, one against.

What it predicts

  • one-glyph variants of common words should behave alike in context (homophone substitution does not change the plaintext) — form/function coupling above any natural language
  • exact phrase repetition should be rare even where word repetition is high (homophone choice breaks phrase identity)
  • a homophonic solver validated on planted keys should, for the right language and unit, reach held-out 4-gram scores near the language's own and dictionary coverage well above random

Evidence none for · 1 against

Homophonic substitution of five languages fails
Established · weighs heavily · F-021
AGAINST

Tested by 5 runs

RunMeasuredResultAgainstDecisionDate
RUN-008Spearman(form sim, context sim) top-300 words0.147Languages ≤0.09 · shuffled -0.03Supported22 Oct
RUN-009share of 5 nearest context-neighbours within edit distance 10.15Languages 0.01–0.07 · shuffled 0.03Supported22 Oct
RUN-019held-out gap (own minus decoded), nats/char, best of 19 configurations0.34 (Latin.novowel slots spaces=True)Planted-key control 0.02 · plain languages 0.7-3.5Not supported (no key transfers)22 Oct
RUN-054held-out gap, six configurations re-run with the stronger frequency penaltyLatin slots 2.02, Italian slots 2.20, German slots 2.48, Latin glyph 2.34, vowel-less Latin slots 0.72, glyph 0.73Control 0.02-0.08Not supported22 Oct
RUN-010homophonic solver recovers planted 80-unit Latin key, no spaces0.983With spaces 1.0Control passed22 Oct

The questions it answers

Cite it

Mysteries Department. (2026). A known language under a homophonic cipher [Answer ANS0D8FZT8445MD]. https://mysteriesdept.com/r/ANS0D8FZT8445MD
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