Voynich Manuscript as a charlatan's prop

[Rafal]

Negative ideas (that are based on a hoax) can’t be refuted until someone comes up with a solution.

Yes, that's a problem. It's really hard to prove any hoax theory.

You can tell stories like the mine above. You can make them more or less probable. But even if some story is probable, it still doesn't mean that it happened.

I can see two ways of proving or trying to prove a hoax theory.

1) Extra evidence
So it may happen that someone will find one day a totally unknown document related to Voynich Manuscript that will shed new light upon it. This is however quite independent of our efforts, you may browse libraries and old documents for years and still find nothing.

2) Linguistic and statistic analysis
This is a a difficult case. Voynich language behaves neither like a real European language nor like some random stuff. It has patterns but some of them are weird. It's some borderline case.
So if you want to see language there then you will see language. And if you want to see gibberish, you will see gibberish.