Voynich Manuscript/Answer/ANS0D8FZT8445MD

A known language under a homophonic cipher

Ruled out failed its test

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.

Files

data/analysis/framework/out/form_function.csv	1 KB	Open
data/analysis/framework/out/repeats_passages.csv	6 KB	Open
data/analysis/framework/out/homophonic_control.csv	743 B	Open
data/analysis/framework/out/homophonic_voynich.csv	899 B	Open

Links

answers	Is it a cipher of a known language?	QST08JG2PB04SQP
against (from)	Homophonic substitution of five languages fails	EVD0D8GDP383XD5
tests (from)	Form-function coupling (spelling vs context similarity): Spearman(form sim, context sim) top-300 words	RUN0D8EPN3P3Y5M
tests (from)	Form-function coupling (spelling vs context similarity): share of 5 nearest context-neighbours within edit distance 1	RUN0D8EPNBG2T1M
tests (from)	Homophonic solver with planted-key controls and permutation null: held-out gap (own minus decoded), nats/char, best of 19 configurations	RUN0D8EPQSM4ZMN
tests (from)	Homophonic solver with planted-key controls and permutation null: held-out gap, six configurations re-run with the stronger frequency…	RUN0D8EQ0B24DHR
tests (from)	Homophonic solver with planted-key controls and permutation null: homophonic solver recovers planted 80-unit Latin key, no spaces	RUN0D8EPNKA3W8S

Kind: hypothesis
Stage: tested
Tests: ["T6-form-function", "T4d-phrases", "T3a-control", "T3b-homophonic"]
Family: CIPHER
Origin: deductive
Result: T6 — Spearman(form, context) 0.147 and 15 % of nearest context-neighbours within edit-1, vs ≤0.09 / ≤9 % for 21 language samples incl. vowel-less and abjads; T4d — zero repeated 4-word phrases (Pliny 16, Bible texts 150–900); T3a — solver recovers planted 80-unit Latin keys (100 % with spaces, 98 % without; vowel-less Latin 98 %, gap 0.02); T3b — 19 searches (Latin, Italian, German, French, Czech, vowel-less Latin × glyph / slot / merged-pair / word units × spaces kept or removed): held-out gap 0.7–3.5 nats for all plain languages (control 0.02), keys collapsed onto 8–17 letters, dictionary rates largely reproduced by frequency-matched permutations of the found keys; vowel-less Latin gap 0.34, 82 % dictionary vs 57 % permuted, output not Latin. Re-run with the stronger frequency penalty (lam = 2) and polishing sweep of ch. 26: plain-language gaps 2.0-2.5 unchanged; vowel-less Latin 0.72-0.73 (the earlier 0.34 was the alphabet collapsing onto a few consonants)
Predictions: ["one-glyph variants of common words should behave alike in context (homophone substitution does not change the plaintext) \u2014 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\u0027s own and dictionary coverage well above random"]
Ledger status: not-supported

In the research Session 6: Phase 2: registered tests, brute force, five surveys; book v1.1Proposed

History

v1 · 25 Oct 2026 · Voynich Manuscript: sync from the research ledger

1a220df1bef9f3da32946b4d121a547e3c6cbc721f80c8b755655197c66fab07