Re: Non-linear / full-2d writing systems?

I think we've gotten into trivialities and are basically agreed.

So... what do you think of full-2d writing itself? Can you conceive of
a nonlinear writing system, and how would "think" in it, read it,
etc.? Or for that matter, what its structure would be - since it would
obviously differ (potentially rather dramatically) from the grammar of
a linear (speech-code) writing system, it's possible that it would
lack phonology, "normal" syntax, etc., though it would still need to
be able to express the same concepts.

For that matter, is there a list somewhere of the basic concepts -
relations, etc - that are necessarily or optionally expressed via
language, separate from the ways in which particular languages or
modes (like speech, sign, or linear writing) use to express them?
(E.g., "noun phrase")

 - SAi