Someone down the thread ruled it out, which I imagine would have been contradicted at some point if it was in error. I wasn't able to see any shape cues to hang the idea of patterns of signifying glyphs on, myself.
I have no idea but I'm going to go with Biblical Hebrew (or Biblical Aramaic) written while holding a pen in their toes. Also I just learned new terms tonight: jot and tittle.
https://pseudoerasmus.com/2014/07/17/shemitic/amp/…