They violate it in the same way you violate it when you write here. When I say that Satoshi started bitcoin in 2009 it's not something I created, it's something I read at some point somewhere and I don't quote when I say things like this. Let alone when the thought is compounded and doesn't refer to a specific piece of data like this.
Do you ask permission to be able to write here when you write without quoting?
That's common knowledge. Of course you don't have to look for sources for something like that. You weren't born with that knowledge of who created Bitcoin but you acquired it and it's now a common piece of information.
That's all well and good but neither of you is addressing the main issue here: I write a doctoral thesis, of my own authorship, without plagiarizing, and when I go to give a presentation of it the presentation is written for me by Chat GPT.
Is that plagiarism?
That depends. If AI creates your presentation based on your own doctoral thesis then I don't see anything wrong with that. You are then using AI to assist you with presenting something you wrote. You aren't plagiarizing and stealing without giving credit from someone/something else. Using AI to write a doctoral thesis and using it to summarize a thesis or converting it into a presentable format are two different things.
And let's get to the specific point of this thread, I create or acquire a business and when I want to make an OP for a forum I tell an AI to make it for me.
Is that plagiarism?
Again, it shouldn't be because I would assume that the AI is working with prompts and detailed information you fed it about your company. It isn't just making things up on its own or copying what it found from another thread.