Bigrams across uncertain spaces

[Emma May Smith]

Reading this thread I think two really useful things could be done:
1. As Marco suggests, have some automated way of identifying or measuring gaps between glyphs. This would help to clarify exactly what we mean by ambiguous spaces. Whether there is a continuous variation from "definitely adjacent" to "definitely a word break", or a distinct U-shaped distribution  where very few gaps are intermediate.
2. Regarding Patrick's observation, is there some way of distinguishing between ambiguity which we see (or measure), and ambiguity which the writer/reader would have seen? That is, is "ambiguity" a concept applying only for researchers, or for the script/text itself?