Run · Voynich Manuscript
T41 ceiling: held-out coverage with a near-true key, planted control (one sign per letter vs full T39 setting)
Lattice EM decipherment: sign boundaries and key learned together, with a structure-preserving null: Held-out dictionary coverage decoded with the true channel and with EM started from it, against the gate bar.
Result
| Run | Measured | Result | Against | Decision | Date |
|---|---|---|---|---|---|
| Run | Held-out dictionary coverage decoded with the true channel and with EM started from it, against the gate bar | one sign per letter, no nulls: 0.518 (true channel), 0.518 (EM from truth); bar 0.483. Full T39 setting: 0.433 and 0.441; bar 0.488 | Best random-restart decodes: 0.312 and 0.324 | For the simplest system the gate is reachable if search finds the key; for the full T39 setting (homophones, 30 % copied nulls, line layer) even the true key decodes below the bar with a bigram element model, so no search can pass that control with this decoder. Generation 4 therefore tests annealing on the simple system first. |
What it used and found
MTH
Latin genre texts
DATDataset
Parameters
pw = 0.25, control = Pliny NH 16, period.generate seed 77, em_iterations = 60
Cite it
Mysteries Department. (2026). T41 ceiling: held-out coverage with a near-true key, planted control (one sign per letter vs full T39 setting) [Run RUN0DCG56XXNDPT]. https://mysteriesdept.com/r/RUN0DCG56XXNDPT
@misc{mysteriesdept_run0dcg56xxndpt,
title = {T41 ceiling: held-out coverage with a near-true key, planted control (one sign per letter vs full T39 setting)},
author = {{Mysteries Department}},
year = {2026},
note = {Run, catalog key RUN0DCG56XXNDPT},
url = {https://mysteriesdept.com/r/RUN0DCG56XXNDPT}
}