Both ADHD people and neurotypicals have deeply structured thoughts. "Serializing" those thoughts without planning ahead leads to the "stream of consciousness" writing style, which includes things like run-on sentences and deeply nested parentheses. This style is considered poor form, because it is hard to follow. To serialize and communicate thoughts in a way that avoids this style, it is necessary to plan ahead and rely on working memory to hold several sub-goals simultaneously, instead of simply scanning back through the text to see which parentheses have not been closed yet.
It could also be simply that ADHD people have "branchier" thoughts, hopping around a constellation of related concepts that they feel compelled to communicate despite being tangential to the main point; parentheses are the main lexical construct used to convey such asides.
When you explain it serially you are forced to choose a spanning tree, and people usually stop listening when the spanning tree has touched all the relevant concepts, then they persuade themselves they got the full picture but miss some connections, that make the problem more complex and nuanced.
When graphs have more than one loop, loopy belief propagation doesn't work anymore and you need an another algorithm to update your belief without introducing bias.
I want to be able to simultaneously encode [[Computer Science]] and [[Computer]] [[Science]].
And [[Project1/Computer Science]] to at least provide a connection to [[Project2/Computer Science]].
That said, knowing when to use dashes—longer than hyphens—can help mix things up.
He can produce whole paragraphs of this semi-regular language and it even has distinct structure and non-standard interactions like in the above sentence.
"One guy write in style"
in (most of the times <this> (or deeper)) style
Also: while I'm not the guy GP references, I am a guy that does that too - or rather did, at some point in the past, until I realized there's like 5 people in my life who could understand this without an issue, even less who'd indulge me or enjoy communicating this way. So over time, I got back to writing like a normal person[0]; I guess conformity is just less mentally taxing.
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[0] - Mostly - I still use semicolons and single-depth parentheses a lot, and on HN, also footnotes.