I'm pretty sure they didn't.
And that isn't the point actually.
The point is to live up to the fuck-up.
That's how you could actually make heaps of brownie points, by admitting to it.
There are honest mistakes. They really exist.
Yet that isn't what's going on.. Nearly 90% of the population sees it as plagiarism, and yet, instead of using it to their advantage, they come up with pathetic and hilarious excuses. They act like little petty criminals being caught for shoplifting by a cop. No matter what you try to bring up, you only dig yourself into it ever deeper.