They probably meant "the human world", cities, etc. For example in the subway, the warning for the closing of doors used to be only audio, now you can see more modern ones that have both audio and visual cues that doors are about to close. In the same way, when crossing at a traffic light, there used to be only visual cues. In some cities now you have places that also have audio cues for people that need it.
Yes, its called transient and it’s pretty simple to use for your own projects. I wrote a transient for my work tasks and now ex. Creating a new youtrack issue is effortless.
I suppose the simplest would be to have to split to two windows with the same buffer with "Ctrl x 3", and press "Shift+Tab" to only have the headline. That is if all the conversation are on the same file.
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