When you’re explaining something to someone, the dialog often can get into:
“So, X-Y-Z, and then A-B-C, and so I G-H-I.”
“Wait- I don’t understand that– you said, “A-B-C?”
“Yes… Is that… Is there something wrong with that?”
“Well, I would have thought A → J → K…”
“Oh! Okay, so here’s how A → B → C works out…”

If they hadn’t been talking, if
had just been a paper, …
“So, X-Y-Z, and then A-B-C, and so I G-H-I.”
“Wait- I don’t understand that– it said, “A-B-C?”
“Because, isn’t it the case, that A-J-K?”
“Hmm, … Should I keep reading this, and hope it makes sense later? Or, should I stop reading this, since it’s wrong?”
“Or, maybe I’m wrong, and I am missing something? Maybe I should check my facts?”

So, the ability to click on a HyperLink? in a HyperText? approximates conversation, in that it lets you ask for clarification on terms or points. If the other end of the link is explanatory, then it works.
This is not to trivialize conversation: There are myriad forms of conversation, (NCDD), and in great conversations, which regularly feature multiple people, ideas flow between people. Conversation is a far greater world, than just one person teaching another person.
Wiki gets a little closer to the open conversation, in that there’s an edit button, and you can actually say something original. You can follow meaningful links until you get to a point of disagreement, and then say something there (ArgumentRouting?.)
MarvinMinsk? used to talk about how, one day, the books in the library may listen, speak, and converse with one another.
none yet