Good job finding a source on the internet supporting your case. I can do the same.
https://english.la.psu.edu/undergraduate/plagiarism-policy/
Paraphrasing, stating someone else’s ideas in your own words, can lead you to unintentional plagiarism.
https://academicintegrity.uoguelph.ca/plagiarism/types-plagiarism
So we all know that you cannot take the ideas from another text, even when you are putting them completely into your own words, without citing the source.
https://apus.libanswers.com/writing/faq/2389
If you keep in mind a very basic definition of plagiarism (representing someone else's words, data or ideas as your own)
Edit: I did not downvote you for the act of paraphrasing/plagiarism in itself. I did it because I don't believe you deserve being rewarded for the ideas and content someone else wrote.
You are right in the aspect that I should have mentioned the sources.
Would you still downvote if I would use something licensed under creative commons (CC), GNU, MIT, BSD (or any similar) license, which allows all kinds of (even commercial) usage? I would mention the author and the source, of course.
I would not but if your post consisted of only that I wouldn't upvote it either.
I learned the lesson. If I will use someone else's content, then I will mention the sources.
Have a nice weekend mate. Enjoy a beer if you're into that.