[yberreby]

That is also the case on Wikipedia, though. And it's not always trivial to rectify.

[jdiff]

I have never myself seen a situation where cited sources on Wikipedia did not back it up where that fact wasn't already noticed and called out by someone else. It is a frequent and common occurrence with LLMs.

[yberreby]

I have seen it noticed, called out in the talk page, and not rectified.