Discussion of "A possible generating algorithm of the Voynich manuscript"

[ReneZ]

With other words it is only possible to replace a glyph with a similar one! For instance it is possible to replace [ch] with [sh]. 

This is exactly my point.

There is nothing arbitrary about the appearance of similar words. The term 'similar' in this context is misleading, because the glyphs can be called similar because they appear in similar contexts.

r and s look similar but they can only very rarely replace each other.
r and l can, but they don't look all that similar.

The rules are actually quite complicated.

o and a are similar and can replace each other in some contexts.

y looks similar to both, and can replace the other two in even fewer contexts. If near the end of a word, a can have lots of things following it but y cannot.

The rules for changes are manifold and complex, and are observed throughout the MS.

The summary remains that there is no doubt that similar words appear near each other, or on the same page, but there is no evidence that suggests that this is the result of an intentional process to copy words from previous words while making arbitrary changes.