Immediately I warn you that in this post there is no answer to the question indicated in the title, but there is a story that made you look for the answer to it.
The story began on September 20, when we,
zhukich and
I , working on our housing and utilities project, read about the opening of the state-owned project “RosZhKH” (from NP “Housing and Communal Services Development” and the state corporation “Foundation for Assistance to Housing Reform Reform”). We went-looked,
poplev grieved and already wanted to close, but the eye caught on the text of one page ...

The fact is that we published a very, very similar post
in our LiveJournal about a month before, here's an excerpt:
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In general, it is clear that the text was simply copied and slightly rewritten. Something like “Damn, is this a state structure, did they really come to this?! ...”, and the hands already wrote a letter to
Andrei Chibis , such as the person in charge of this project. The text is not a pity to us and its reprinting says that it is written well and correctly. But just like it was done in NP “Utilities Development”, a state-owned company, it simply undermines faith in people. At our request to remove the text or put a link to the original, there was no intelligible answer (there was an answer in the spirit of “We are doing one thing, let's cooperate” - aha, cooperation is in one gate).
We are advised to go to court and we are considering this option. But we, unfortunately, are not strong in copyright law and it’s impossible to fully understand whether such a phenomenon is provable. We would be glad to know the opinion of the community - perhaps someone would have similar experience, help or advice would not hurt us.
As at least some evidence of the primacy of our text can be cited:
1. data on pages in search engines;
2. the history of creating a document in Google Docs, - because The article was written right there online, you can restore its appearance in all its details.
Already, we see several drawbacks to the court, because of which they have not done anything so far:
1. in any case, it will take time and effort, but you do not want to be distracted from the main (of your project) time, just enough time;
2. there is no certainty that our evidence is sufficient and that rewriting will not be considered a separate copyright work;
3. there is no understanding of the possible compensation and sanctions to the defendant in case of a successful outcome of the case.
Thus, we want to know the opinion of the community - is the copyright provable under rewriting? Does it make sense to get involved in legal proceedings?
UPD: Thank you to all who expressed themselves, the best advice in our opinion from
ChemAli user: Be stronger: write a note on yourself that, well, you are so cool that even “state-owned companies” quote you, despite the presence of your super-paid and experienced specialists. And then drive and move on.