For the verbal phenomenon, I think that is just a symptom of human brain function. Only a small amount of processing is conscious verbalisation, so you will nee

For the verbal phenomenon, I think that is just a symptom of human brain function. Only a small amount of processing is conscious verbalisation, so you will need to talk about new things while your subconscious processes other ones. As for online, I think the idea of threads is obviously antithetical to the concept of linear discussion. When you organise things as a tree, you present the many branches as though each is a valid target for a new entry. If you want things to be discussed linearly, you must present that discussion linearly. This linear discussion is feasible only in text, as you have time to think something over before verbalising it.