Even when there are deliberately stylistic adaptations of grammar for literary effect, or unintended non-standard grammar, I'd still expect to see some clear syntax. Cvetka's poem exhibits clear syntax.
If the Voynich manuscript was mostly/entirely lists (as the Linear B tablets were inventories), then we would expect minimal grammar. But while there probably are some lists there, the text appears to be flowing prose.
There is also the possibility of words being deliberately reordered in a random way in a sentence as part of a cypher technique. If this were the case, then I would imagine the solution would be extremely difficult both to discover in the first place and to prove. As you say, lack of grammar is why multiple solutions have failed to be proved. I think the solver's only hope would be to "translate" each individual word in the manuscript and show that in each paragraph they could all be rearranged to form grammatical sentences without exception, and that the paragraphs clearly flowed from one another. But since it's clearly not a simple substitution cipher, I can't see how the solver would be able to work out what the rest of the words mean without syntax as an aide.
It's also worth noting that theories haven't failed only because they've fallen short of an arbitrary standard of grammar: they've failed because they have nothing to distinguish themselves from rival theories. Multiple people have shown how easy it is to build up a lexicon of deciphered Voynichese words for completely different languages. Demonstrating a correlation with the grammar of the proposed language, along with explaining Voynichese behaviour, seem to me to be the only two ways a theory could stand out from the pack and be seriously studied and start the path towards acceptance. Without both, there's just...noise.
In short, if there is no/very little grammar in the Voynich, I can't see how it could be solved in the first place, let alone proved.
[Edit - some speculation You are not allowed to view links. Register or Login to view. en francais about why the song is written that way]
If the Voynich manuscript was mostly/entirely lists (as the Linear B tablets were inventories), then we would expect minimal grammar. But while there probably are some lists there, the text appears to be flowing prose.
There is also the possibility of words being deliberately reordered in a random way in a sentence as part of a cypher technique. If this were the case, then I would imagine the solution would be extremely difficult both to discover in the first place and to prove. As you say, lack of grammar is why multiple solutions have failed to be proved. I think the solver's only hope would be to "translate" each individual word in the manuscript and show that in each paragraph they could all be rearranged to form grammatical sentences without exception, and that the paragraphs clearly flowed from one another. But since it's clearly not a simple substitution cipher, I can't see how the solver would be able to work out what the rest of the words mean without syntax as an aide.
It's also worth noting that theories haven't failed only because they've fallen short of an arbitrary standard of grammar: they've failed because they have nothing to distinguish themselves from rival theories. Multiple people have shown how easy it is to build up a lexicon of deciphered Voynichese words for completely different languages. Demonstrating a correlation with the grammar of the proposed language, along with explaining Voynichese behaviour, seem to me to be the only two ways a theory could stand out from the pack and be seriously studied and start the path towards acceptance. Without both, there's just...noise.
In short, if there is no/very little grammar in the Voynich, I can't see how it could be solved in the first place, let alone proved.
[Edit - some speculation You are not allowed to view links. Register or Login to view. en francais about why the song is written that way]

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