Though it's answered above let me add mine.
What qualifies as plagiarism on the forum?
- Copying and pasting text from a source without giving credit to the original author or without citing the source.
- Paraphrasing someone else's work too closely without acknowledging the original source.
What are the consequences for violating the plagiarism rule?
Banning.
How can users ensure that their posts are original and do not violate the plagiarism rule?
Your own words and your own thoughts which are you're safe, how to avoid?
Don't interact with that topic that you don't know.
Are there any exceptions or nuances to the plagiarism rule that users should be aware of?
No exception, no second chance.
For every platform that we join or use, there should be terms and this forum has also rules and guidelines that you must follow.
It's ideal for newbies to read the official guidelines on the forum before starting to post.