Why is there even a Voynich B?

[Jorge_Stolfi]

I often wonder about Voynich A and Voynich B and why there even are two different 'languages'. It is likely not that important to most solutions but it always seemed strange to me that there even would be two different 'languages'.

Since I am personally in favour of a cipher solution, my favourite theory is that Voynich A had a 'flaw' in its cipher method or simply that Voynich B was a new and improved cipher. I'm also partial to the idea of the same cipher being used on two different underlying languages.

What is everyone else's personal theories?

My favorite theory is still that Voynichese is not cipher, but an exotic language that the Author recorded, in a phonetic notation of his own invention, from dictation by a native speaker.

So my best three guesses for the A/B difference is that (1) the Author changed the spelling system between the two sets. or (2) the Author switched to another Dictator with a different dialect, or (3) the two sets come from two different source texts written in different dialects.

However, I have not looked at the A/B differences carefully enough to say whether they are compatible with either of these hypotheses.

Independently of my theory above, I think it is very unlikely that the text was composed by the Author himself.  Given the range of subjects and the differences between the organization of the various sections, I think each section is likely to have been copied from a separate book that had been written by someone else, possibly abridging or summarizing it.

All the best, --jorge