It doesn’t matter how complex they are.
also it's the fact that he rhymed those same words pretty much in the same order
just by the law of averages, that would be highly unlikely.
As a person who actually has been stolen from by well known artists and at least 2 battle rappers on the low ,I know how niggas steal when they steal, and they do it in a particular way to leave a benefit of the doubt with slight changes.
Also, sometimes as a writer, another person’s rhyme scheme or a punchline can just subconsciously end up in your shit and that’s why the lot of proof reading and double checking is necessary.