Positional Mimic Cipher (PM-Cipher)

[quimqu]

Well, I understand what you say. It is true that long sentences would be ciphered the same way, and that Voynich does not have long sentences repeated.
There is one thing in the equation to test. It is also known that the first initial word of each sentence is restricted to a couple of glyphs. If those glyps, for example, were keys to change the residuals order, we would also have different ciphers for the same word...