Yes, it's bizarre. I asked whether you had changed you mind about it - Copilot said No. But then it takes a logical leap to assume that it must therefore be some sort of core belief.

It's really not very intelligent.

I asked Copilot whether you changing your mind.

And for junior academics with piles of scripts to mark, it's unlikely that they would have spotted those quotations. There's also a ridiculously high standard of proof required in many universities. You and I may know it's AI, but, well... it could just be a random mistake.