Good point. I think it would depend on how useful the word is in describing the world. If your culture has very different norms between “boyfriend/girlfriend” and fiancé then a replacement for fiancé would likely appear.
I suppose that on one extreme you would have words that are fundamental to human life or psychology e.g. water, body, food, cold. These I’m sure would reappear if banned. Then on the other extreme you have words associated with somewhat arbitrary cultural behaviour e.g. thanksgiving, tinsel, Twitter, hatchback. These words may not come back if the thing they are describing is also banned.
Uncle/father is an interesting one. Those different meanings could be described with compound words. Father could be “direct makuakane” and uncle “brother makuakane”, or something like that. We already use compound words in family relations in English like “grandfather” whereas Spanish it is “abuelo”.
You might be interested in this paper, it supports the idea of a constant information processing rate in text. "Different languages, similar coding efficiency: Comparable information rates across the human communicative niche", Coupe, Mi Oh, Dediu, Pellegrino.. 2019, Science Advances.
I would agree that language would likely adapt to newspeak by simply using other compound words to describe the same thing. Within a generation or two these would then just become the new word. Presumably the Orwellian government would have to continually ban these new words. Perhaps with enough pressure over enough years the ideas themselves would be forgotten, which is perhaps Orwell's point.
I think the claim that sophisticated word use is caused by intelligence signalling requires more evidence. It is I'm sure one aspect of the behaviour. But a wider vocabulary is also beneficial in terms of being able to more clearly and efficiently disambiguate and communicate ideas. This could be especially true I think when communicating across contexts - having context specific language may help prevent misunderstandings that would arise with a more limited vocabulary. It would be interesting to try and model that with ideas from information theory.
I was thinking something similar. I vaguely remember that the characteristic function proof includes an assumption of n being large, where n is the number of variables being summed. I think that allows you to ignore some higher order n terms. So by keeping those in you could probably get some way to quantify how "close" a resulting distribution is to Gaussian. And you could relate that back to moments quite naturally as well.
I like to think of advertising as commercial propaganda. That is technically what it is. Whereas political propaganda's purpose may be to influence people to support a political belief, commercial propaganda is to influence people to support a commercial enterprise.
People tend to think of political propaganda as something from World War 2 and authoritarian regimes. But it was used in the West and it never went away. It just became more sophisticated over time and a part of that was re-branding it to "spin" or "public relations". The original word is useful because it is accurate and it highlights the obvious negative consequences of the practice.
With neuropreservation you might also lose the sense of embodiment, of being in a body and the body being a part of you. That could be extremely traumatic to the point where you wouldn't want to come back without your body. It is unclear whether that could be successfully countered using a "grown" body or a sophisticated simulation if you are being uploaded.