That's not the case, there's a probability it may "spit back" the protected expression. There's also a probability I, as a human "spit back" the protected expressions. This could either be by pure chance or from past learnings, reading the protected code and internalizing it as a solution, my subconscious forgetting I actually saw it elsewhere.

In Uni, students run their theses through plagiarism checkers, even if it's novel research as it naturally occurs.

As the thought experiment goes, given infinity, a monkey with a typewriter will inevitably write Shakespeares works.