[RobertoG]

"We do the same thing when we dream [..]"

I think you don't go far enough: We do the same thing when we are awake, too.

I tend to agree with your interpretation. This plays good also with the other post in the first page about the possibility of visual grammars ( https://news.ycombinator.com/item?id=13615273 ). If you play with your grammar you get strange languages.