You should read Torsten's You are not allowed to view links.
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Login to view. on how Voynichese could have been generated (self-citation method). It includes a potential explanation of similar glyph clusters/rigid glyph positions, and it also sets out a spectrum of changes across the scribal sections for certain common word types. You can find discussion of one of the key papers on the forum You are not allowed to view links.
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Short of finding a contemporaneous instructions manual, rough draft, or confession note, it's not possible to
prove it was a medieval hoax.
So perhaps the question is better phrased as: what would it take for consensus to form around it being a medieval hoax? This is difficult. A correct decipherment ought to get consensus relatively quickly, especially given how much written material there is in the VM to make the case with. But I think consensus would take much longer for the hoax hypothesis.
You can see on Koen's State of the Voynich You are not allowed to view links.
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Login to view. from earlier this year and other polls that there is not currently any such consensus. If anything, Koen's poll shows belief in it being any kind of hoax has decreased, although there may be representation issues here: it wouldn't surprise me if people who believe it is a hoax generated by a method like Torsten's are probably less likely to stick around the forum, since it may mean the mystery is solved in their eyes.
I think for such a consensus to form, you'd need:
- a method that fully explains the range of extremely odd behaviours in Voynichese. I don't think we're there yet. For example, the Voynich Day presentation I gave looked at "vertical impact" behaviour where sometimes a glyph starting one line may influence the glyph immediately below it according to certain rules. I'm writing an article on this with more detail, but it sounds very unlanguage-like to me. Yet it also sounds like a really oddly specific rule to have when producing gibberish! Neither is completely inconceivable, but nor does either sound very plausible. So, I don't yet feel comfortable that any of the standard paradigms fully captures Voynichese behaviour. Even if there is a method that provides a full explanation, though, it likely still wouldn't be sufficient for consensus, and so we would need:
- general hope to be given up that there is an (enciphered and obscured) natural language beneath it all. There's no signs of hope being lost any time soon. People would also have to abandon hope that AI will one day get sophisticated enough to be able to decipher it.
In other words, I think if the medieval hoax hypothesis is to win out and gain consensus, it will have to be very, very patient!