I've asked it a question not in it's dataset three different ways and I see the same three sentences in the response, word for word, which could imply it's caching the core answer. I hadn't previously seen this behavior before this last week.
Isn’t the simpler explanation that if you ask the same question, there’s a chance you would get the same answer?
In this case you didn’t even get the same answer, you only happened to have one sentence in the answer match.