[split] Stolfi's Core-mantle-crust model

[Mark Knowles]

It's easy to be mislead by the similar structure of system names like prefix-stem-suffix and core-mantle-crust. A huge difference is that core-mantle-crust actually is based on 5 word parts:
crust-mantle-core-mantle-crust
i.e. there are both a core-prefix and core-suffix and a mantle-prefix and mantle-suffix. All the parts are optional and actually I don't think any single actual word features all the five components. The "core" basically is a gallows character: the main concept could be that at most a single gallows appears in a voynichese word.
The mantle is largely made of curve-glyphs: e-sequences and benches.
The two crust-layers are those characters that only appear as prefixes of suffixes.
A while ago, I translated Stolfi's grammar (as well as You are not allowed to view links. Register or Login to view.) to python-lark, so that I can plot parse trees for them.
Here is an example of an invented word (qochepchody) that contains all the 5 components in Stolfi's model.

But when we are talking about this I think we are not saying that all Voynichese words conform to this structure unless this structure is defined in a way that it is so flexible that any series of glyphs that one can conceive of can be made to fit this structure. e.g. I have seen words that end in a gallows character. Are we saying that these structures are universal i.e. there is not one Voynichese word that doesn't fit them or are we saying they are very common?

I think often when we talk about Voynichese it is important to make a distinction between those phenomena that apply to all Voynichese words and those phenomena that apply to a majority(maybe a large majority) of Voynichese words. There are lots of properties of Voynichese that are described, but the extent to which they breakdown when expected to describe every single Voynichese word is significant, I think.