People are accountable for the results they produce using AI. So a scientist is responsible for made up sources in their paper, which is plain fraud.

"responsible for made up sources" leads to the hilarious idea that if you cite a paper that doesn't exist, you're now obliged to write that paper (getting it retroactively published might be a challenge though)

I completely agree. But “disclosing the use of AI” doesn’t solve that one bit.