Bigram = phoneme theory (language agnostic)

[nablator]

There are two ways Voynichese is positional... the groupings of glyph combinations, and where they can occur in a token.

The first goes very well with the natural idea of a 'verbose' cipher with homophones and nulls, the second not really. One way to resolve the apparent contradiction is to have the same glyph play different roles, just like the Latin con-, -us abbreviation, but that still restricts severely the possibilities.